Alpha GPC (L-alpha-Glyceryl phosphorylcholine) 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.  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 support the brain's synthesis of acetyl-choline. In this way, it helps to promote normal cognitive function and mental acuity. NOW® natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 1968, NOW has been making top quality products that are tested to the highest standards to empower people to lead healthier lives. NOW Foods' promise - what is on the label, is precisely what is in the bottle.    Recommended Dosage: Take 2  capsules twice daily with food.    Caution: Consult a health care practitioner prior to use if you are pregnant or breastfeeding.