And, former treatments that cost next-to-nothing are, mainly, relegated to the pages of history... that very few read... like HCl (hydrochloric acid) therapy.
It blew my mind, the things that some people will think will work and end up performing better than they ever thought. Case histories, here:
I also saw that high-doses of vitamin C brought a man back from the brink of death --he was in a coma and it woke him almost immediately after the first dose was administered, IIRC. From 60 Minutes, New Zealand edition:
Many accounts of this non-toxic vitamin can be found regarding it curing almost any ailment or disease... it's amazing to think, now that I know from some research, that the US RDA for vitamin C is just enough to keep the average person at a pre-scurvy state of health.