Phosphatidylserine (PS) is an essential component of all neuronal membranes. Human research suggests PS may help support overall brain wellness. PS helps maintain healthy cortisol levels and is beneficial for memory and concentration. PS 150 features 150 mg of non-soy, sunflower-sourced phosphatidylserine (PS) per capsule. There are no foods rich in PS, so supplementation is essential in order to increase the body's levels of this brain-supportive nutrient.