Happy Dad can vouch for this one...
We had a brother that was obsessed with alternative medicine. He also claimed to be of the anointed and was a known drunk. Anyways, one of his most famous exploits was colloidal silver. He claimed he cured his wife of cancer with using it. Now, I know for a fact that his wife was suspected of having cancer, but her daughter said after having a follow up appointment, the doctor said she had fibroids in her breast, not cancer. But that didn't stop this brother for she endured two months of the colloidal silver treatments, actually turning somewhat grayish from it because he swore he could cure it. It was only with the intervention of her daughter to stop it that she began to get better (her daughter was PIMO at the time, now is POMO). After 6 months she was better and lo and behold, she was cured by his treatments. He became a sort of cult hero for some locally seeking alternative remedies after that. He actually ended up dying from trying to cure his own cancer many years latter. I remember his daughter telling me if he had seeked medical treatment when he was first diagnosed, he would have still been alive.