Windmill Magnesium Gluconate 500 mg provides a high-quality magnesium supplement in an easy-to-swallow tablet form. Each tablet contains 500 mg of magnesium gluconate, a bioavailable form of magnesium that supports a variety of essential functions in the body. Magnesium is involved in over 300 biochemical processes, including muscle function, nerve transmission, energy production, and the maintenance of a healthy heart and bones.