{"id":12526,"date":"2026-01-28T10:17:48","date_gmt":"2026-01-28T10:17:48","guid":{"rendered":"https:\/\/csiag.de\/?p=12526"},"modified":"2026-01-28T12:42:52","modified_gmt":"2026-01-28T12:42:52","slug":"colloids-safely-effective-or-not","status":"publish","type":"post","link":"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/","title":{"rendered":"Colloids - safely effective or not?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_Silber_Ag\" >Colloidal silver (Ag)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Aktueller_wissenschaftlicher_Stand\" >Current scientific status<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Vorhandene_Studien_und_deren_Limitationen\" >Existing studies and their limitations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Systematische_Reviews_und_Meta-Analysen\" >Systematic reviews and meta-analyses<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Problematik_der_Bioverfugbarkeit\" >The problem of bioavailability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Regulatorische_Position\" >Regulatory position<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Dokumentierte_Risiken_bei_oraler_Einnahme\" >Documented risks with oral intake<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_Gold_Au\" >Colloidal gold (Au)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Wissenschaftlicher_Stand\" >Scientific status<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_Gold_%E2%80%93_Evidenzlage\" >Colloidal gold - evidence base<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Bioverfugbarkeit_und_Pharmakokinetik\" >Bioavailability and pharmacokinetics<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#24_Sicherheitsprofil\" >2.4 Security profile<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_Kupfer_Cu\" >Colloidal copper (Cu)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Wissenschaftlicher_Stand-2\" >Scientific status<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_vs_ionisches_Kupfer\" >Colloidal vs. ionic copper<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Toxizitatsrisiko\" >Toxicity risk<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_Zink_Zn\" >Colloidal zinc (Zn)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Wissenschaftlicher_Stand-3\" >Scientific status<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Evidenz_fur_Zink-Supplementierung_nicht_spezifisch_kolloidal\" >Evidence for zinc supplementation (not specifically colloidal)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kolloidales_Zink_spezifisch\" >Colloidal zinc specific<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Risiken\" >Risks<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Andere_metallische_Kolloide\" >Other metallic colloids<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Platin_Palladium_andere_Edelmetalle\" >Platinum, palladium, other precious metals<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Nicht-metallische_Kolloide\" >Non-metallic colloids<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Zusammenfassende_Evidenztabelle\" >Summarized evidence table<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Warum_gibt_es_so_wenig_klinische_Forschung\" >Why is there so little clinical research?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Strukturelle_Grunde\" >Structural reasons<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Was_bedeutet_das_fur_die_Interpretation\" >What does this mean for the interpretation?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Praktische_Konzentrationen_in_kommerziellen_Produkten\" >Practical concentrations in commercial products<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Topische_vs_orale_Anwendung_%E2%80%93_ein_wichtiger_Unterschied\" >Topical vs. oral application - an important difference<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Belegte_topische_Anwendungen\" >Proven topical applications<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Warum_funktioniert_topisch_aber_nicht_oral\" >Why does topical work but not oral?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kritische_Bewertung_von_Anekdoten_und_Erfahrungsberichten\" >Critical evaluation of anecdotes and field reports<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Warum_personliche_Berichte_nicht_ausreichen\" >Why personal reports are not enough<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Was_ware_notig_fur_Evidenz\" >What would be necessary for evidence?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Wissenschaftliche_Quellen_fur_weitere_Recherche\" >Scientific sources for further research<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Fazit\" >Conclusion<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Kernaussagen\" >Key messages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/#Empfehlungen_aus_wissenschaftlicher_Sicht\" >Recommendations from a scientific perspective<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time<\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>\n<p class=\"wp-block-paragraph\">This paper is based on published scientific studies. It is crucial to understand that the absence of clinical evidence does not mean that something is ineffective, but merely that insufficient scientifically controlled studies have been conducted or that previous studies have not produced clear results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">All \u201ehome\u201c generators only produce <em>ionized<\/em> Water - not colloids! Due to the lack of laboratory-certified measuring technology available to laypersons (the often-mentioned conductivity meters do not provide any reproducible and therefore reliable data on the water's <em>ppm<\/em> (parts per million) again), it is always unknown what \u201edose\u201c you are taking. The resulting risks are manifold and should not be underestimated.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The following is scientifically based information for better orientation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_Silber_Ag\"><\/span>Colloidal silver (Ag)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Aktueller_wissenschaftlicher_Stand\"><\/span>Current scientific status<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Summary of the evidence:<\/strong> For the oral intake of colloidal silver there are <strong>No clinical studies<\/strong>, that would demonstrate medical efficacy in the treatment of diseases that meet the standards of evidence-based medicine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vorhandene_Studien_und_deren_Limitationen\"><\/span>Existing studies and their limitations<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In vitro studies (laboratory studies):<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Numerous laboratory studies show antimicrobial properties:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Morones et al. (2005)<\/strong> in <em>Nanotechnology<\/em>: Silver nanoparticles show antibacterial effect against E. coli at concentrations of 10-100 \u03bcg\/mL in cell culture<\/li>\n\n\n\n<li><strong>Rai et al. (2012)<\/strong> in <em>Applied Microbiology and Biotechnology<\/em>Antimicrobial activity against multi-resistant bacteria in vitro<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Important restriction:<\/strong> In vitro effects cannot be directly transferred to the human organism. The digestive tract, pH value, protein binding and other factors dramatically change the bioavailability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Animal testing:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hadrup &amp; Lam (2014)<\/strong> in <em>Regulatory Toxicology and Pharmacology<\/em>Systematic review - Most animal studies focus on toxicity, not therapeutic effect<\/li>\n\n\n\n<li>Some animal studies show antimicrobial effects, but dosages and conditions are not transferable to humans<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Human studies:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are <strong>No published randomized, placebo-controlled double-blind studies (RCTs)<\/strong>, that prove the effectiveness of orally ingested colloidal silver in the treatment of infections or other diseases.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Systematische_Reviews_und_Meta-Analysen\"><\/span>Systematic reviews and meta-analyses<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cochrane Database (2023):<\/strong> No entries for oral intake of colloidal silver for infections<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Hadrup et al. (2018)<\/strong> in <em>Regulatory Toxicology and Pharmacology<\/em>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Comprehensive review of silver in medical applications<\/li>\n\n\n\n<li>Conclusion: Topical application documented, oral application insufficiently researched<\/li>\n\n\n\n<li>No sufficient evidence for systemic therapeutic effects<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problematik_der_Bioverfugbarkeit\"><\/span>The problem of bioavailability<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why oral intake is problematic:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Protein binding:<\/strong> Silver ions bind to proteins and chloride ions in the digestive tract<\/li>\n\n\n\n<li><strong>Formation of AgCl:<\/strong> Poorly soluble silver chloride is formed in the stomach<\/li>\n\n\n\n<li><strong>Low absorption:<\/strong> Only a small percentage reaches the bloodstream<\/li>\n\n\n\n<li><strong>Quick elimination:<\/strong> About bile and kidneys<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pharmacokinetic studies:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Loeschner et al. (2011)<\/strong> in <em>Particle and Fiber Toxicology<\/em>: Investigation of the distribution of orally ingested silver nanoparticles in rats - low systemic bioavailability<\/li>\n\n\n\n<li><strong>Van der Zande et al. (2012)<\/strong> in <em>ACS Nano<\/em>Absorption of silver nanoparticles &lt;1% of the oral dose<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Regulatorische_Position\"><\/span>Regulatory position<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>FDA (USA):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Classifies colloidal silver as \u201enot safe and effective\u201c for medical applications<\/li>\n\n\n\n<li>Ban on medical claims since 1999<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>EMA (Europe):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No approved oral silver preparations for systemic infections<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>BfR (Germany):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Warning against uncontrolled intake<\/li>\n\n\n\n<li>No scientific basis for therapeutic claims<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dokumentierte_Risiken_bei_oraler_Einnahme\"><\/span>Documented risks with oral intake<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Argyrie:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Wadhera &amp; Fung (2005)<\/strong> in <em>American Journal of Clinical Dermatology<\/em>: Documentation of argyria cases after oral silver ingestion<\/li>\n\n\n\n<li>Irreversible blue-grey skin discoloration<\/li>\n\n\n\n<li>Already possible with cumulative doses of 1-5 g silver<\/li>\n\n\n\n<li><strong>Calculation example:<\/strong> At 10 ppm and 50 mL daily = 0.5 mg\/day \u2192 critical accumulation possible after 5-10 years<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Other documented side effects:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Neurological symptoms (rare)<\/li>\n\n\n\n<li>Interaction with medication (antibiotics, thyroxine)<\/li>\n\n\n\n<li>Possible change in the intestinal flora<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gulbranson et al. (2000)<\/strong> in <em>Journal of Toxicology<\/em>Case reports of side effects after long-term oral administration<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_Gold_Au\"><\/span>Colloidal gold (Au)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wissenschaftlicher_Stand\"><\/span>Scientific status<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Medically recognized applications:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gold compounds (non-colloidal gold) are used therapeutically:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Auranofin and gold sodium thiomalate:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Approved medication for rheumatoid arthritis<\/li>\n\n\n\n<li><strong>Finkelstein et al. (1976)<\/strong> in <em>Annals of Internal Medicine<\/em>: Clinical studies on gold-based antirheumatic drugs<\/li>\n\n\n\n<li><strong>Important:<\/strong> These are defined chemical compounds, not colloidal suspensions<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_Gold_%E2%80%93_Evidenzlage\"><\/span>Colloidal gold - evidence base<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Available research:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Incidental observations:<\/strong> Some historical reports from naturopathy<\/li>\n\n\n\n<li><strong>In vitro:<\/strong> Gold nanoparticles show anti-inflammatory properties in cell cultures<\/li>\n\n\n\n<li><strong>Human studies:<\/strong> No published RCTs on orally ingested colloidal gold<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Brown et al. (2010)<\/strong> in <em>Nanomedicine<\/em>: Review on gold nanoparticles in medicine - focus on drug delivery and diagnostics, not on direct therapeutic effect when taken orally<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bioverfugbarkeit_und_Pharmakokinetik\"><\/span>Bioavailability and pharmacokinetics<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Absorption:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gold nanoparticles are hardly absorbed in the GI tract<\/li>\n\n\n\n<li><strong>Hillyer &amp; Albrecht (2001)<\/strong> in <em>Journal of Pharmaceutical Sciences<\/em>&lt;1% oral bioavailability for nanoparticles<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>No established therapeutic dose<\/strong> for colloidal gold when taken orally<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"24_Sicherheitsprofil\"><\/span>2.4 Security profile<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Generally considered safer than silver:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No risk of accumulation as with silver (no \u201egoldosis\u201c)<\/li>\n\n\n\n<li>Low toxicity at typical concentrations<\/li>\n\n\n\n<li>But also no proven effect when taken orally<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_Kupfer_Cu\"><\/span>Colloidal copper (Cu)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wissenschaftlicher_Stand-2\"><\/span>Scientific status<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Copper as an essential trace element:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Copper is a necessary nutrient (RDA: 0.9 mg\/day for adults), but:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Normal diet covers requirements<\/li>\n\n\n\n<li>Supplementation only makes sense if there is a proven deficiency<\/li>\n\n\n\n<li><strong>Turnlund et al. (1998)<\/strong> in <em>American Journal of Clinical Nutrition<\/em>: Studies on copper homeostasis<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_vs_ionisches_Kupfer\"><\/span>Colloidal vs. ionic copper<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The problem of differentiation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Many \u201ecolloidal\u201c copper products contain primarily ionic copper (Cu\u00b2\u207a)<\/li>\n\n\n\n<li>True colloidal particles (Cu\u2070) are unstable and oxidize quickly<\/li>\n\n\n\n<li>No scientific literature on the medical effect of specifically colloidal copper when taken orally<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Toxizitatsrisiko\"><\/span>Toxicity risk<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Copper has a narrow therapeutic window:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Overdose:<\/strong> &gt;10 mg\/day may lead to toxicity<\/li>\n\n\n\n<li><strong>Wilson's disease:<\/strong> Genetic disorder with copper accumulation - contraindicated<\/li>\n\n\n\n<li><strong>Gastrointestinal symptoms:<\/strong> Nausea, vomiting with higher doses<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Institute of Medicine (2001)<\/strong>Tolerable Upper Intake Level = 10 mg\/day<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_Zink_Zn\"><\/span>Colloidal zinc (Zn)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wissenschaftlicher_Stand-3\"><\/span>Scientific status<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zinc as an essential trace element:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Well documented importance for the immune system (RDA: 11 mg\/day for men, 8 mg\/day for women)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Evidenz_fur_Zink-Supplementierung_nicht_spezifisch_kolloidal\"><\/span>Evidence for zinc supplementation (not specifically colloidal)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Colds:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hemil\u00e4 et al. (2017)<\/strong> in <em>Cochrane Database<\/em>: Meta-analysis of zinc lozenges for colds\n<ul class=\"wp-block-list\">\n<li>Result: Reduction in the duration of colds by approx. 33%<\/li>\n\n\n\n<li><strong>Important:<\/strong> Studies used zinc acetate or gluconate, not colloidal zinc<\/li>\n\n\n\n<li>Dosage: 75-100 mg\/day during the common cold<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Immune function:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prasad (2008)<\/strong> in <em>Journal of Trace Elements in Medicine and Biology<\/em>: Zinc improves immune response in case of deficiency<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kolloidales_Zink_spezifisch\"><\/span>Colloidal zinc specific<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lack of evidence:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No published studies comparing colloidal zinc form with other forms<\/li>\n\n\n\n<li>No evidence that colloidal zinc has advantages over conventional zinc supplements<\/li>\n\n\n\n<li>Bioavailability probably similar or worse than established forms (citrate, gluconate)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Risiken\"><\/span>Risks<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Overdose:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Interference with copper absorption at &gt;50 mg\/day long-term<\/li>\n\n\n\n<li>Gastrointestinal complaints<\/li>\n\n\n\n<li>Tolerable Upper Limit: 40 mg\/day (Institute of Medicine)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Andere_metallische_Kolloide\"><\/span>Other metallic colloids<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Platin_Palladium_andere_Edelmetalle\"><\/span>Platinum, palladium, other precious metals<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Scientific literature:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Virtually no published human studies on oral administration<\/li>\n\n\n\n<li>Some in vitro studies on the antioxidant properties of platinum nanoparticles<\/li>\n\n\n\n<li><strong>No established therapeutic applications<\/strong> when taken orally<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Nicht-metallische_Kolloide\"><\/span>Non-metallic colloids<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Micellar vitamin preparations:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is a legitimate pharmaceutical application of colloid technology:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Goncalves et al. (2021)<\/strong> in <em>Nutrients<\/em>Improved bioavailability of fat-soluble vitamins through micelles<\/li>\n\n\n\n<li>Clinically relevant use in malabsorption<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Zusammenfassende_Evidenztabelle\"><\/span>Summarized evidence table<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>colloid<\/th><th>RCT evidence<\/th><th>In vitro activity<\/th><th>Oral bioavailability<\/th><th>Approved medical use oral<\/th><th>Security concerns<\/th><\/tr><\/thead><tbody><tr><td><strong>Silver<\/strong><\/td><td>None<\/td><td>High (antimicrobial)<\/td><td>Very low (&lt;1%)<\/td><td>None<\/td><td>High (argyria)<\/td><\/tr><tr><td><strong>Gold<\/strong><\/td><td>None<\/td><td>Agent (anti-inflammatory)<\/td><td>Very low (&lt;1%)<\/td><td>None (colloidal form)<\/td><td>Low<\/td><\/tr><tr><td><strong>copper<\/strong><\/td><td>None (as colloid)<\/td><td>N\/A<\/td><td>Unknown<\/td><td>Only in the event of a proven defect<\/td><td>Medium-high (toxicity)<\/td><\/tr><tr><td><strong>Zinc<\/strong><\/td><td>Yes (other forms)<\/td><td>N\/A<\/td><td>Probably low<\/td><td>Yes (as salt, not colloid)<\/td><td>Means (in case of overdose)<\/td><\/tr><tr><td><strong>Platinum\/other<\/strong><\/td><td>None<\/td><td>Weak<\/td><td>Unknown<\/td><td>None<\/td><td>Unknown<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Warum_gibt_es_so_wenig_klinische_Forschung\"><\/span>Why is there so little clinical research?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Strukturelle_Grunde\"><\/span>Structural reasons<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lack of patentability:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Natural elements cannot be patented<\/li>\n\n\n\n<li>No financial incentive for expensive clinical trials (Phase I-III cost 100+ million euros)<\/li>\n\n\n\n<li>Pharmaceutical companies do not invest without exclusive rights<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Regulatory hurdles:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unclear classification (dietary supplement vs. drug)<\/li>\n\n\n\n<li>Standardization problems (variable particle sizes, concentrations)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Methodological challenges:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Difficult blinding (color!)<\/li>\n\n\n\n<li>Quality control of the test substance<\/li>\n\n\n\n<li>Long-term safety studies required<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Was_bedeutet_das_fur_die_Interpretation\"><\/span>What does this mean for the interpretation?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Absence of evidence \u2260 Evidence of absence<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The absence of RCTs does not necessarily mean that colloidal metals are ineffective. It means:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>We have no scientifically robust confirmation of efficacy<\/li>\n\n\n\n<li>We cannot provide evidence-based dosage recommendations<\/li>\n\n\n\n<li>Long-term safety has not been systematically investigated<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Praktische_Konzentrationen_in_kommerziellen_Produkten\"><\/span>Practical concentrations in commercial products<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Typical concentrations on the market:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Colloidal silver:<\/strong> 5-50 ppm (some up to 500 ppm)<\/li>\n\n\n\n<li><strong>Colloidal gold:<\/strong> 10-30 ppm<\/li>\n\n\n\n<li><strong>Other metals:<\/strong> 10-50 ppm<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Usual dosage information (manufacturer's instructions, not evidence-based):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1-3 teaspoons (5-15 mL) daily<\/li>\n\n\n\n<li>At 10 ppm = 0.05-0.15 mg metal per day<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Scientific evaluation of these doses:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>For silver and gold: Probably too low for systemic effect with poor bioavailability<\/li>\n\n\n\n<li>For essential trace elements (Zn, Cu): Significantly below RDA<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Topische_vs_orale_Anwendung_%E2%80%93_ein_wichtiger_Unterschied\"><\/span>Topical vs. oral application - an important difference<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Belegte_topische_Anwendungen\"><\/span>Proven topical applications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Silver in wound treatment:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Vermeulen et al. (2007)<\/strong> in <em>Cochrane Database<\/em>: Systematic review of silver-containing wound dressings<\/li>\n\n\n\n<li><strong>Result:<\/strong> Moderate evidence for efficacy in infected wounds<\/li>\n\n\n\n<li><strong>Mechanism:<\/strong> Direct contact with bacteria, no systemic absorption required<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>concentrations topically:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Medical wound dressings: 50-100 ppm silver<\/li>\n\n\n\n<li>Direct antimicrobial contact<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Warum_funktioniert_topisch_aber_nicht_oral\"><\/span>Why does topical work but not oral?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Decisive differences:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Direct contact:<\/strong> Silver ions have a direct topical effect on bacteria<\/li>\n\n\n\n<li><strong>No GI inactivation:<\/strong> No gastric pH, no protein binding<\/li>\n\n\n\n<li><strong>Local concentration:<\/strong> High concentration at the site of action possible<\/li>\n\n\n\n<li><strong>Bioavailability irrelevant:<\/strong> Systemic absorption not required<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kritische_Bewertung_von_Anekdoten_und_Erfahrungsberichten\"><\/span>Critical evaluation of anecdotes and field reports<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Warum_personliche_Berichte_nicht_ausreichen\"><\/span>Why personal reports are not enough<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Placebo effect:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>For subjective symptoms (fatigue, pain), the placebo response rate is often 30-40%<\/li>\n\n\n\n<li><strong>Finniss et al. (2010)<\/strong> in <em>Lancet<\/em>: Review of placebo effects<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Spontaneous remission:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Many illnesses (colds, mild infections) heal spontaneously<\/li>\n\n\n\n<li>Temporal connection \u2260 Causality<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Confirmation Bias:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tendency to remember and report positive experiences<\/li>\n\n\n\n<li>Negative experiences are documented less frequently<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Publication Bias:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Positive results are more likely to be published than negative ones<\/li>\n\n\n\n<li>Many small studies with negative results remain unpublished<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Was_ware_notig_fur_Evidenz\"><\/span>What would be necessary for evidence?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Randomized, placebo-controlled, double-blind studies with:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Sufficient number of participants (power analysis)<\/li>\n\n\n\n<li>Objective endpoints (not just subjective symptoms)<\/li>\n\n\n\n<li>Standardized product (defined particle size, concentration)<\/li>\n\n\n\n<li>Peer-reviewed publication<\/li>\n\n\n\n<li>Replication by independent researchers<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Such studies do not currently exist for oral intake of metallic colloids.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wissenschaftliche_Quellen_fur_weitere_Recherche\"><\/span>Scientific sources for further research<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended databases:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PubMed\/MEDLINE:<\/strong> pubmed.ncbi.nlm.nih.gov\n<ul class=\"wp-block-list\">\n<li>Search terms: \u201ecolloidal silver oral\u201c, \u201esilver nanoparticles ingestion\u201c, \u201egold nanoparticles oral bioavailability\u201c<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Cochrane Library:<\/strong> cochranelibrary.com\n<ul class=\"wp-block-list\">\n<li>Systematic reviews and meta-analyses (gold standard)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Web of Science:<\/strong> webofscience.com\n<ul class=\"wp-block-list\">\n<li>Citation analysis, impact factors<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Important review articles:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Hadrup &amp; Lam (2014):<\/strong> \u201eOral toxicity of silver ions, silver nanoparticles and colloidal silver - A review\u201c in <em>Regulatory Toxicology and Pharmacology<\/em><\/li>\n\n\n\n<li><strong>Fung &amp; Bowen (1996):<\/strong> \u201eSilver products for medical indications: risk-benefit assessment\u201c in <em>Journal of Toxicology<\/em><\/li>\n\n\n\n<li><strong>Lansdown (2006):<\/strong> \u201eSilver in health care: antimicrobial effects and safety in use\u201c in <em>Biofunctional Textiles and the Skin<\/em><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Fazit\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kernaussagen\"><\/span>Key messages<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>There are no robust clinical studies on the oral intake of metallic colloids (especially silver and gold)<\/strong>, that would prove medical efficacy according to the standards of evidence-based medicine.<\/li>\n\n\n\n<li><strong>In vitro activity (in the laboratory) is well documented<\/strong>, especially for silver, but <strong>Not transferable to oral intake<\/strong> due to extremely low bioavailability.<\/li>\n\n\n\n<li><strong>Topical application of silver<\/strong> in wound treatment is <strong>Scientifically proven<\/strong> - Here it works through direct contact.<\/li>\n\n\n\n<li><strong>Risks associated with long-term oral administration are documented<\/strong>, especially argyria in silver.<\/li>\n\n\n\n<li><strong>The lack of evidence is primarily a research problem<\/strong>, This is not necessarily proof of ineffectiveness - there is simply a lack of high-quality studies.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Empfehlungen_aus_wissenschaftlicher_Sicht\"><\/span>Recommendations from a scientific perspective<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If you want to take metallic colloids orally:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Consult a doctor, especially if you have any existing illnesses<\/li>\n\n\n\n<li>Be aware that you have a <strong>not evidence-based<\/strong> Select treatment<\/li>\n\n\n\n<li>Monitor possible side effects<\/li>\n\n\n\n<li>Do not expect a \u201emiracle effect\u201c<\/li>\n\n\n\n<li>Do not replace evidence-based treatments<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For essential trace elements (zinc, copper):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Conventional preparations are better studied and probably more bioactive<\/li>\n\n\n\n<li>If you suspect a deficiency, first have a blood level determined<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The scientifically honest answer is:<\/strong> We do not know for sure because the necessary studies have never been conducted. The available data suggest that oral bioavailability is too low for systemic therapeutic effects, but definitive evidence in the form of RCTs is lacking.<\/p>","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Reading time<\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutes<\/span><\/span>Diese Abhandlung basiert auf ver\u00f6ffentlichten wissenschaftlichen Studien. Es ist entscheidend zu verstehen, dass das Fehlen klinischer Evidenz nicht bedeutet, dass etwas unwirksam ist, sondern lediglich, dass keine ausreichenden wissenschaftlich kontrollierten Studien durchgef\u00fchrt wurden oder bisherige Studien keine eindeutigen Ergebnisse erbracht haben. Alle &#8222;Heim&#8220;-Generatoren erzeugen nur ionisiertes Wasser &#8211; keine Kolloide! Mangels f\u00fcr Laien verf\u00fcgbare laborzertifizierter&hellip;&nbsp;<a href=\"https:\/\/csiag.de\/en\/blog\/2026\/01\/28\/kolloide-sicher-wirksam-oder-nicht\/\" rel=\"bookmark\">Read More \"<span class=\"screen-reader-text\">Colloids - safely effective or not?<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-12526","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"modified_by":"Achim Goerner","_links":{"self":[{"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/posts\/12526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/comments?post=12526"}],"version-history":[{"count":0,"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/posts\/12526\/revisions"}],"wp:attachment":[{"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/media?parent=12526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/categories?post=12526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csiag.de\/en\/wp-json\/wp\/v2\/tags?post=12526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}