Looking for a supplement for a 96 year old man who is starting to have memory issues/slight dementia but nothing too severe yet. I am looking into Neuron Growth Factors which contain acetyl l carnitine arginate DiHCl, acetyl l-carnitine hcl, gotu kola, ginko biloba and uridine.. It's for my grandfather so I need something that he will "feel" fairly quickly because he's a tough egg to crack. I am juggling around just giving him some Alpha-GPC which I know will probably work semi-quickly so he will want to continue taking it.. He's become very stubborn.. If anyone has any recommendations that have worked with people in that age bracket please advise. Thanks!