Dietary supplement formulated with magnesium, citrate and vitamins B1, B6, B12, C and D3. Contributes to the normal functioning of the immune system during and after intense physical exercise. Suitable for people who practice sports, as it improves contraction, relaxation and muscle function of the athlete, reducing the risk of cramps. Free of gluten, lactose and cow's milk proteins. No nuts. It comes in effervescent tablets format with delicious lemon flavour.