Watts & Minerals is an effervescent tablet that dissolves in water or can be added to your sports drink as an 'upgrade' on hot training days. The effervescent tablets contain the electrolytes magnesium, sodium, potassium, chloride and calcium. This supports the energy level (when adding it to a sports drink), the energy metabolism and contributes to a proper electrolyte balance (magnesium). In addition, calcium supports the functioning of the muscles.