Hello @wadamw and welcome to Mayo Clinic Connect.

Colloidal silver has come up several times in the MAC group. When it comes to supplements and complementary medicine, I always refer to NIH's National Center for Complementary and Integrative Medicine to better understand the proven evidence. See this information:

– Colloidal Silver https://nccih.nih.gov/health/silver

The first section of the page states: What’s the Bottom Line?
How much do we know about colloidal silver?
There are no high quality studies on the health effects of taking colloidal silver, but we do have good evidence of its dangers.

What do we know about the effectiveness of colloidal silver?
Claims made about the health benefits of taking colloidal silver aren’t backed up by studies.

What do we know about the safety of colloidal silver?
The U.S. Food and Drug Administration (FDA) has said that colloidal silver isn’t safe or effective for treating any disease or condition.

According to Dr. Brent Bauer from Mayo Clinic says "Colloidal silver isn't considered safe or effective for any of the health claims manufacturers make. Silver has no known purpose in the body. Nor is it an essential mineral, as some sellers of silver products claim."
You can read more in this article:
– Colloidal silver: is it safe? https://www.mayoclinic.org/healthy-lifestyle/consumer-health/expert-answers/colloidal-silver/faq-20058061

Did you work with your doctor?