Dietary Supplement. America s #1 Trace Mineral Brand Performance Electrolyte. More Energy. Better Hydration. Reduce Muscle Cramps* Endure is a special blend of essential electrolytes your body needs to perform at optimum levels of energy, stamina, and hydration during competition or any strenuous activity.* Proper hydration helps to reduce the incidence of muscle cramping and fatigue so you can endure longer.* And it contains no sugar or additives to weigh you down. Get the edge you need to perform at your best with Endure. Gluten Free AVA™ Certified Vegan Contains no known allergens.