Alpha GPC (L-alpha glycerylphosphorylcholine) is a phospholipid metabolite found concentrated in neuronal membranes. Alpha GPC is well absorbed and crosses the blood brain barrier.* As a substrate involved in the synthesis and secretion of acetylcholine, Alpha GPC supports brain function and learning processes.* Alpha GPC supports neuronal health and promotes signal transmission by serving as a precursor to membrane phospholipids.