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BCAA supplements are designed for anyone who trains hard regularly and wants to preserve lean muscle tissue while preventing catabolism (muscle breakdown).* The 3 BCAAs (L-Leucine, L-IsoLeucine, and L-Valine) play a critical role in muscle development because they are metabolized in the muscle rather than the liver.* Because BCAAs are metabolized in the muscle, they can be used for building new proteins or for energy.* Browse all BCAA supplements below, or select a sub-category to narrow your search.