- #1 US cycling supplement since 2006. Bicycling magazine staff favorite. - Primes muscles to make less lactic acid in the first place. Cycling feels easier with less muscle "burn" during the ride, and less soreness after. - Healthy FDA Generally Recognized As Safe ingredients: 88% European natural-source lactate (not lactose), muscles' preferred fuel. With balanced calcium, magnesium and vitamin D to speed absorption, in color-free vegetable capsules. UCI & WADA legal. No sodium, gluten, dairy or calories. - Fast and inexpensive: No weeks-long "loading" phase like other products. Works in half an hour - No need to take every day. Take only before and during exercise.