Whats in SportLegs The active ingredients are premium natural source European lactate compounds of calcium and magnesium with Vitamin D. Lactate isn't the same as lactose. No dairy source ingredients are in SportLegs. Other ingredients to maintain potency of the delicate Vitamin D are gluten free modified corn starch, sucrose, sodium ascorbate, dl alpha tocopherol, vegetable oil triglycerides and silicon dioxide. These premium ingredients are packed into color free hypromellose vegetable capsules. Recommended by testers at USA Today, Bicycling magazine, and BIKE magazine, used to help win five straight US mountain bike championships. Inexpensive and can be taken only before riding, no need to take it everyday. Healthy natural source lactate compounds of calcium and magnesium, plus Vitamin D for full absorption, in vegetarian capsules. Gentle enough to be taken on an empty stomach. Works by raising blood lactate ahead of time, replicating the signal your muscles obey to slow lactic acid production your muscles produce only what they need to perform their best.