Natural supplements such as vitamins and hormones are protected by federal regulation and may not be patented. Major pharmaceutical manufacturers are interested only in patentable drugs that are exclusive and profitable. A lot of what physicians learn is from the drug companies who are promoting their products, therefore, your doctors are primarily taught only about synthetic products. Bio-identical hormones do not come under specific brand names. Your physician must be self-educated and experienced in prescribing and monitoring natural hormones. They probably just don’t know a lot about them or must prescribe within the constraints of your health insurance.