Home | What is Colloidal Silver? | What promoters claim? | Evidence For and Against | FDA and FTC Action | Disclaimer | News Research Not Supporting Colloidal Silver Silver products for medical indications: risk-benefit assessment. Fung MC, Bowen DL. Center of Drug Evaluation and Research, Food and Drug Administration, Rockville, Maryland, USA. Claims that indiscriminate use of silver products can lead to toxicity such as argyria. (Again, research is conducted on silver compounds, not colloidal silver on this website.) Home | What is Colloidal Silver? | What promoters claim? | Evidence For and Against | FDA and FTC Action | Disclaimer | News