Acupuncture seems to work for small aches, my grandma swore by it for her knee, it did nothing for my aunt though who needs surgery. Some herbal supplements seem to do something for small things like mint teas for a stomach ache or oil of eugenol for a toothache, not sure how much weight I would put on them for serious conditions.

I tried St. John's wort when I felt my mood sinking and was really broke combined with a cheap probiotic, so I only had to take half as much since everything is so expensive, and it seemed to help a lot, though it gave me some insomnia.

Colloidal silver looks like a simple scam by silver sellers to me. Essential oils outside of skin care and maybe diluted tea tree for low grade skin and yeast infections I'm very wary of. They smell nice, some like myrrh are very nice on skin when mixed in a lotion, but they don't nearly do all of what advertisers claim, and they're dangerous for pets, small children and those sensitive to strong smells.