Melatonin When old rats are fed melatonin, they can reproduce again--one indication that age has been turned around. This major antioxidant is one of the few substances than can penetrate every cell in your body. Because melatonin is involved in resetting your biological clock, it helps relieve jet lag and insomnia too.

DHEA (dehydroepiandrosterone) This adrenal hormone is a precursor to all sex hormones. Perhaps because of this, its affects are far reaching including as an anti-cancer agent and aiding Alzheimer's patients.

Growth Hormone This hormone declines rapidly after age 40. However, when supplemented it dramatically reverses aging by 20 years by encouraging regrowth of organ tissue and muscles, and stimulating your body's repair mechanisms.

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