Bio-identical hormone replacement therapy (BHRT), or hormone replacement therapy refers to the use of hormones that are near identical on a molecular, compound level to naturally occurring hormones in the body. They are often made from natural sources like soy and plants and are FDA approved. Performing a thorough medical history, blood testing of hormone levels when indicated, and the implementation of FDA approved or specialized pharmacy compounded hormones, one can obtain optimal levels in the body. Many hormones used in BHRT may include estrogen, progesterone, testosterone and thyroid hormone.