Hormone levels inevitably decline as a man or woman ages. Production of hormones by the body tends to decline -- and become imbalanced -- as we age, and as a result we begin to feel less well and less vigorous. Bioidentical hormone therapy is designed to replenish the hormones that you need to feel good and function at your best! Hormone deficiencies occurs when the production of natural hormones decline in aging adults sometime after the age of 30. Menopause in women and andropause in men are terms for medical conditions that are usually associated with low and imbalanced hormone levels. Hormone Replacement Therapy (HRT) is the process by which vital hormones like human growth hormone, estrogen and testosterone are replaced on a prescribed schedule to mimic the body's natural process. Bioidentical hormones are natural -- usually plant-based -- substances that have an identical molecular structure and chemical composition as the hormones naturally produced by your body. By contrast, synthetic hormones have intentionally different molecular structures: drug companies can't patent a molecule produced naturally by the human body, so they design synthetic hormones that are molecularly different and therefore patentable -- Premarin, Prempro, and Provera being the most obvious and widely prescribed examples of products containing synthetic hormones.