Our electrolytes powder sachets have been expertly crafted to effectively and rapidly combat dehydration, replace vital minerals and reduce fatigue during exercise. With 4 added minerals including Magnesium which contributes to electrolyte balance and supports energy-yielding metabolism, as well as Vitamin C and all 8 essential B Vitamins which are necessary for normal energy-yielding metabolism and contributing to a reduction of tiredness & fatigue (Claims supported by EFSA).