-Solaray Magnesium Citrate 400 mg Capsules For Bone Strength & Muscle Support is designed to give nutritional support for normal bone, heart, muscle, neuron, and digestive function. This composition, which is chelated with citric acid, is intended to improve absorption while also making digestion easier. It is supposed to function better than other magnesium supplements. This product contains no artificial colours, flavours, or preservatives.