Phosphatidylserine is a phospholipid naturally present in cell membranes. Supplements come from soy or sunflower lecithin. Soy-derived phosphatidylserine has the most research behind it. Sunflower-derived phosphatidylserine is a good option for people who avoid soy. Both forms absorb and behave similarly.
People use it to support memory, focus, and the body's stress response. It helps moderate cortisol levels, which can ease the effects of mental strain and chronic stress.
Take it with meals to improve absorption. Most people tolerate it well, but a few notice mild digestive upset.