Natural bioidentical hormones have a chemical structure that is identical to the hormones produced by our bodies. We refer to them as "natural" because they occur naturally within the body. Since these substances are found in nature, pharmaceutical companies cannot patent them. On the other hand, synthetic hormones have a similar structure but are not identical to the hormones produced by the body. These structural differences cause synthetic hormones to act differently, leading to significantly different effects in the body. It is important to note that bioidentical (natural) hormones and synthetic hormones are not interchangeable. Numerous studies have shown various adverse effects associated with synthetic hormones, while the medical literature indicates that bioidentical hormones have no harmful effects, only beneficial outcomes.