Since 1932 Innovative Quality Dietary Supplement 1 Daily ActivGels - Liquid-Fill Softgels 100 mg Soy FreeDiscussion: KAL Phosphatidyl Serine 100 is from Non-GMO sunflower lecithin. Phosphatidylserine (PS) is a phospholipid component of cell membranes essential for the functioning of brain cells. PS is absorbed in the body and thought to cross the brain-blood barrier.