Interesting. I just ordered CDP choline and am using Huperzine A and pregnenolone. Will be interesting to see if the choline makes even more difference. The other two have helped. Also got Gotu Kola coming. That should help with blood flows. Another supplement I use for blood thinning - since I'm positive for Lupus Anticoagulant - has Ginko in it. So I think I have all the bases on choline and cognitive function covered as well as I can. Only other one I know is Vinpocetine. Tried that one years ago and for some reason - didn't stick with it.Here is an interesting podcast dealing with choline and acetylcholine...I had no idea that estrogen, for example, turned on a gene in the liver to make more choline so men and post-menopausal women are at much greater risk for choline deficiency.