I ordered alpha gpc 50% in bulk powder: 1st time in 50 grams and then the second in 25 grams. I take Inositol in water once a day and alpha gpc, a choline source, is good to stack inositol with. Alpha-GPC works to increase a chemical in the brain called acetylcholine. That brain chemical helps with memory and learning. I had bought this to supplement with my pramiracetam also over about a month ago. I stayed at the recommended dose of 600 mg. It gave me more energy, made it easier to talk to people, and I just felt better. I use it to keep keep headaches at bay when stacking with other supplements (nootropics).
Healthsupplementwholesalers.com has it the cheapest I have been able to find Alpha Gpc and I am very happy with this product. Will buy more :)