Magnesium 100mg - High Strength - Muscle Function - Energy. Magnesium Oxide 100mg Tablets. Magnesium 100mg(Per Serving) 26.67%(%NRV ). Ingredients: Magnesium Oxide, Bulking Agents (Microcrystalline Cellulose, Calcium Phosphate), Anti-Caking Agents (Magnesium Stearate, Silicon Dioxide).