ProBasic, based on mineral salts, alkalising carbonates and bicarbonates, vitamins and coenzyme Q10, helps maintain normal acid-base balance and physiologically supports sports performance. In particular, zinc contributes to normal acid-base metabolism, selenium and vitamins C and E protect cells from oxidative stress while calcium and magnesium support normal muscle function. Directions for use: Take 4 tablets per day, before going to bed with plenty of water.