NutriBiotic GSE Grapefruit Seed Extract featured A recent study found it A recent study found it can even help obese people improve their body composition and insulin resistance The vibrant colors of the berries originate from the antioxidant rich family of flavonoids known as anthocyanins Consumers in some countries such as France and Australia also advocate using GSE for varicose veins or "heavy legs" and other vascular problems because some studies have shown that the oligomeric proanthocyanidins (OPCs) in it can improve blood vessels' elasticity and reduce their likelihood of leaking the fluids that cause leg swelling and other nutrients that support optimal health