I've been using huperzine a for quite a while, at a dose of about 400-600 mgs a day, with some breaks when I don't feel like taking it. I find it improves the speed of retrieval of names and the like. I like this product because it is more potent than most other products, and it is very very good.
My mom has Alzheimer’s disease; she is in the late stages. She would not eat, drink or talk; she sat in a blank stair. She has been taking Source Naturals, Huperzine A, for over a year. She started back eating (must be fed), drinking and talking again. I done expect her to be healed but I thank God that the disease process was slowed down and I can continue to enjoy the company of my mother. I can only wonder what the effect would have been if I had known about it when my mom first started to have symptoms.