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- Daniel Palmer - founder of chiropractic.
- B. J. Palmer - son of D.D. Palmer and known as the "developer" of chiropractic.
- Linus Pauling - coined the term "orthomolecular medicine" and advocated the use of Vitamin C to prevent or treat viral respiratory diseases, Lipoprotein(a) associated atherosclerosis, and cancer, along with several other megavitamin therapies for mental illness. Pauling was however not a general supporter of alternative medicine.
- Vincent Priessnitz - developed a system of water cures.
Read more about this topic: List Of People In Alternative Medicine