Magnesium is an essential trace element, that is, it is not synthesized by the body. It plays a major role in enzymatic reactions and nerve transmission. He is also recognized as a powerful anti-stress. Present in cocoa and dried fruits, more than half of the French population is deficient. A deficiency leads to fatigue states and muscle weaknesses that can be counterbalanced by magnesium supplementation thanks to some products in the Biocyte range.