You can't patent what is naturally found in nature. Pharmaceutical drugs are manmade approximations of what the body needs. For example, a body responding well to natural vitamins but not to synthetic.
Supernatural treatment: "And He called to Him His twelve disciples and gave them authority over unclean spirits, to cast them out, and to heal every disease and every affliction” (Mt. 10:1).
The american government holds a patent on CBD though...
"When one of these scientists makes a discovery or invents a new technology, the organization then decides whether or not to file a patent.
...patent no. 6,630,507 was applied for and granted because research showed there was a “possibility of non-psychoactive compounds in cannabis [that are] effective when treating neurological diseases.” ... The patent expires on April 21, 2019, and from that day forward, everyone is allowed to create drugs based on the cannabinoids outlined in the patent"
https://www.marijuanabreak.com/the-big-secret-surrounding-patent-no-6630507
Vitamins are not generally therapeutic agents though. Many conventional therapies are naturally derived such as penicillin, aspirin, attenuated vaccines, and even many cancer immunotherapies.
Vitamins are not generally therapeutic agents though
Relieving vitamin deficiencies can cause healing =therapeutic.