Mega Resveratrol is a pharmaceutical-grade 99% pure trans-resveratrol. Mega Resveratrol contains pure trans resveratrol with no excipients, fillers, additives or preservatives added. A 500 mg capsule provides 495 mg trans-resveratrol. Our resveratrol products are available in vegetarian capsules and powder form. MegaResveratrol.com was a pioneer in introducing high potency resveratrol products in 2007, and a proud supplier of resveratrol to various research clinics and institutions in the U.S. and abroad. Our products are manufactured in the USA, and are tested for purity by an independent U.S. laboratory.