Science That Makes Sense. Vanadyl Sulfate Taurine Selenium Chromium and Niacin. Helps maintain healthy blood sugar levels. Gluten Free. Made in USA. Vanadyl Sulfate may "mimic insulin" when given orally to help normalize glucose levels in the body NATURALLY. Vanadyl Sulfate also may act as a High Performance transport system for Minerals Vitamins and other nutrients to help maintain higher Energy Intensity and Endurance levels.