Hydratis Watermelon. 8 tubes of 20 effervescent tablets to be dissolved in water to optimize daily hydration. Supplement containing magnesium, potassium, zinc and manganese. Hydratis is a French company expert in the field of hydration. Dehydration can be felt when there is a lower intake of water and mineral salts than needed. 75% of French people are dehydrated daily; dry mouth, fatigue, aches, lack of concentration. Hydratis is an innovation to optimize hydration at all times when there is an increased need for hydration; physical exercise, heat, cold and dry weather.