https://www.purestcolloids.com
I initially thought this was parody.
The colloidal silver people. They really believe, hard.
Tangential story time:
So my sister, the one that lived in Tucson for a bit, had this weird allergic reaction to something. Her knees swelled up, she couldn't walk, she was tired all the time, and eventually had to use a wheelchair. Tested for everything, had a couple rheumatoid arthritis markers, but not enough, also not Lupus. Decided to go to an allergy specialist. Did testing found she was allergic to corn. Big issue, town was in the middle of a cornfield. Seemed plausible. However they gave her things like desiccated thyroid of something, ok I get she's tired, boxes of random supplements, and then colloidal silver. I asked how this was supposed to help, she said something about boosting the immune system. I said if they think it's an allergy, that's the opposite of what you need happening, and silver does jack shit.
So, she takes this junk for several months, graduates and then moves to Tucson. All issues faded away. Tucson apparently cured her.