Neuroenhancers for focus and attention. Alpha GPC: Alpha-Glycerylphosphorylcholine (alpha-GPC) is discovered in the brain plus has a job in neurotransmission. It gets better memory retention. In clinical studies, it was found to boost working verbal memory as well as memory. Alpha-GPC comes as Arbamax (by Endura Pharmaceuticals), and as Anexsia (by Advanta). Tongkat Ali - What's Tongkat Ali....