Dr. Mercola. Pure Power BCAA + Beta-Alanine is a delicious tropical punch-flavored powder designed to be mixed with water or your favorite beverage, and consumed before, during or after your workout to boost athletic performance and recovery. BCAAs, or Branched Chain Amino Acids, help your body remain in a positive balance to promote muscle growth, repair and reduce muscle soreness after workouts, while Beta-Alanine improves your endurance, increases strength and optimizes recovery.* Our performance-based formula provides 6 grams of BCAAs, including L-Leucine, L-Isoleucine and L-Valine, plus 2 grams of the only globally patented beta-alanine on the market, CarnoSyn Beta-Alanine. BCAA + Beta-Alanine is Certified for Sport by the National Sanitation Foundation (NSF) International, which assures the product contains only what is printed on the label and does not include any of the 272+ substances banned by major athletic organizations. Pure Power Products fuel your body with the right ingredients, so you have the power to build strength from within.