Advantage Capsules – USP food grade, non-GMO ingredients that are Kosher certified are used in the production and extraction of our Grapefruit Seed Extract.The Ultimate Immune Support! Natural source of Ascorbic Acid(Vitamin C), Flavonoids and Antioxidants! Helps maintain a healthy bodyAll the benefits of the naturally bitter Grapefruit Seed Extract in a convenient capsule without the bitter taste!