By age 50, we are at approximately 50% of hormone function for estrogen, progesterone, testosterone, thyroid, DHEA (which enhances strength, sexual energy and immunity), melatonin (known for its effects on sleep, however it is actually one of the most powerful anti-cancer hormones due to its role in activating natural killer cells) and growth hormone. Of course, a healthy lifestyle plays an important role in optimizing cellular function. Of course genes play a role; however at some point our organs will not produce hormones even with the healthiest lifestyle and the best genes.
Symptoms are one reason that people restore hormones; but the more compelling reason is the potential to prevent degenerative disease, since symptoms can be handled by a variety of other ways. Studies show that every brain cell in the body has a receptor for thyroid, estrogen, progesterone and testosterone, as does every heart cell, every nerve cell, every bone cell, every vascular cell and every skin cell. With that, it becomes clear that as hormone levels decline, so will the stimulation to these cells. As stimulation declines, the cells degenerate leading to a myriad of symptoms (such as sexual decline, fatigue, anxiety, mood swings, weight gain, insomnia, cognitive decline), but more importantly degenerative diseases (such as heart disease, cognitive disease, and osteoporosis). Preservation depends on restoration of physiologic hormone levels.