Didn't read the whole thread but 20-25 years ago it was magnets. The idea was, because of shoes, sidewalks, floors, etc. we lost contact with the Earth's magnetism which is transmitted into our bodies through direct contact with the Earth's surface, supposedly causing all manner of maladies. Yet another multi-level marketing uhh, "market" opened for magnetic shoe insoles. There were also a multitude of magnetic back braces, anklets, wristbands, etc. All guaranteed to cure everything from back pain, sleep apnea, and various prostrate "issues" if you get my drift. Even came out with a power wrist strap to cure your bad golf shots.
They all pretty well died out. After my own intro of buying some $200 magnetic insoles from a friend, which only accomplished lightening my wallet by $200 bucks, and a $25 golf bracelet which didn't make me feel better and certainly didn't improve my game, I pretty much became skeptical of it all.
A year ago after a 2nd cancer surgery, and because cycling had become more difficult, I started intermittent fasting, 16 hours a day without eating, also cut out almost all sugar and carbs, dropped 30-35 lbs. Arthritis isn't much troubling any longer, I can cycle longer & with less effort, inflammation has gone way down, sleep is better, and I've suffered only a minor head cold once or twice.
Changing diet, particularly with respect to sugar, carbs, processed crap, and losing some weight can work wonders.