Dehydroepiandrosterone (DHEA), active ingredient in Regeneron, is a steroid hormone precursor, which helps maintain healthy hormone levels and helps support the stress response system. DHEA plays an important role in resistance to disease, with low levels being linked to increased susceptibility to aging and disease. After the age of 30, production begins to decline at a rate of around 2% per year, and this decline is often correlated with the signs and symptoms of aging. Regeneron helps to reverse classic stress-induced physiological responses and support healthy aging.