Pregnenolone is synthesized in the body from cholesterol and is the precursor for all the steroid hormones, including progesterone, aldosterone, cortisol, dehydroepiandrosterone (DHEA), testosterone, and estrogens.* The endogenous production of Pregnenolone begins to decline after age 35.* Supplementation with Pregnenolone helps support mood, well-being, memory and immune function.* It has been suggested this hormone may play a role in the neuroendocrine response to stress.*