Again, no good studies (on humans, anyway), but pregnenolone is promoted to improve memory & mental clarity.
Quote:
Pregnenolone is a steroid the body makes as a precursor to other steroid hormones, such as progesterone, DHEA (see DHEA), mineralocorticoids (which regulate electrolyte balance), corticosteroids (which influence inflammation and metabolism), estrogens, and androgens.
http://www.cancer.org/treatment/trea...t/pregnenolone
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I started taking it about 2 years ago, after testing showed my levels to be well below minimum. As a test, I played some of the memory games at lumosity and elsewhere until my scores plateaued. Following taking pregnenolone for a few weeks, my scores increased noticeably before plateauing again. I also began feeling better in other ways.
I wouldn't bother with it if I hadn't tested so low to begin with, or without my doctor's nod.
I wasn't looking for memory improvement (not that I couldn't use more still); I just came across that claim in researching it. If I were looking for something specifically to help memory (I should, but I keep forgetting to...
) I'd probably look for something else.
Doc