Cognitive Support Bioavailable Source of Choline Supports Mental Acuity A Dietary Supplement Vegetarian Formula Alpha GPC is a natural physiological precursor to acetyl-choline, a neurotransmitter that is involved in memory and other cognitive functions. ;Alpha GPC is more bioavailable than other forms of choline and is known to cross the blood brain barrier into the brain. ;In the brain and other neural tissues, Alpha GPC becomes a constituent of cell membranes. ;Clinical studies have demonstrated that supplementation with Alpha GPC can increase the brain's synthesis of acetyl-choline. ;In this way, it helps to support cognitive function and mental acuity.