I used different strengths of PS over a 6 month period on and
off, specifically for memory loss, and didn't notice any results.
I tried phosphatidyl choline for a short time without results.
I've also tried green tea, Vitamin B Complex in varying dosages,
Ginko Biloba, aricept, effexor, strattera, provigil, many different food
combinations, otc thyroid supplemental pills, and other forms
of natural remedies. I've discovered things that make the problem
worse, but so far I've not found a magic pill that's helped memory
loss.

good luck