Longstanding government policies privilege pharmaceutical drugs above natural products, ensuring that drug companies have a monopoly on the healthcare market. Free speech about natural products' benefits is censored by the FDA and the FTC: only FDA-approved drugs can make claims to treat, prevent, mitigate, or diagnose a disease, even if good science supports a range of health benefits for supplements. What health claims natural products can make are then severely restricted by the federal government.
"Any physician, or panel of hospital-based physicians, claiming that vitamin C is experimental, unapproved and/or posing unwarranted risks to the health of the patient, is really only demonstrating a complete and total ignorance or denial of the scientific literature. A serious question as to what the real motivations might be in the withholding of such a therapy then arises - ignorance of medical fact is ultimately no sound defense for a doctor withholding a valid treatment, especially when that information can be easily accessed."
~ Dr. Thomas Levy M.D., J.D.