The BCAA's (branched chain amino acids) L-leucine, L-isoleucine and L-valine are undoubtedly the single most important group of amino acids for athletes. Around 33% of muscle protein consists of BCAAs. Even moderate exercise causes levels of BCAAs to drop rapidly which results in muscle tissue breakdown (catabolism), fatigue, and a drop in testosterone levels. Research shows that athletes who supplemented with BCAAs during tests experienced increased muscle growth and strength, overall increases in energy, and improved muscle power output. USNs pure, pharmaceutical grade BCAA Nano-StackTM contains an ideal 2:1:1 ratio of BCAAs which have been refined into micro-crystallised powder, ensuring the highest possible absorption and retention. 300% of the RDA (Recommended Daily Allowance) of vitamin B6 per daily serving is also included, which is vital in many of the metabolic conversions that occur when using BCAAs. With a total of 3000mg of L-leucine, 1500 mg of L-valine and 1500mg of L-isoleucine per daily serving, USNs BCAA Nano-StackTM is one of the strongest formulations available.
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