Where Science Works Naturally Maximum Strength 250 mg Grapefruit Seed Extract Vegan Dietary Supplement Naturally Fresh Nitro Pak Bacteria Free Environment Not Tested On Animals Made Without Gluten or GMOsNutriBiotic Capsules contain grapefruit seed extract, a compound derived from the seed and pulp of grapefruit. This formula is used by healthcare professionals worldwide.Each capsule is equal to 25 drops of NutriBiotic GSE Liquid Concentrate.