Gu Brew Electrolyte tablets help you replenish essential sodium and potassium to bring your body back into balance and keep you performing at your best. Contains electrolytes sodium and potassium to help accelerate your rehydration. Use in conjunction with GU Sports gels or GU Roctane Sports gels (both sold separately) for the ultimate hydration and fueling solution. Drop 1 Gu Brew Electrolyte tablet in 16 fl. oz. of water; tube contains 12 tablets. Only 10 calories per serving. *Discount will be applied when you check out; offer not valid for sale-price items ending in $. 3 or $. 9.