Evidence supporting the use of: Amino Acid (unspecified)
For the health condition: Body Building

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Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Amino acids, particularly essential amino acids (EAAs) and branched-chain amino acids (BCAAs), are widely recognized for their role in muscle protein synthesis, which is central to bodybuilding and muscle recovery. Scientific studies have repeatedly shown that amino acid supplementation—especially with leucine, isoleucine, and valine (the BCAAs)—can stimulate muscle protein synthesis, reduce muscle breakdown, and improve recovery after resistance exercise. Whey protein, casein, and other protein supplements often provide high levels of amino acids and are commonly used by bodybuilders for this reason. Clinical evidence supports that adequate amino acid intake, whether from food or supplements, is beneficial for maximizing muscle growth in conjunction with resistance training. However, the term "Amino Acid (unspecified)" is broad; while the scientific evidence is robust for specific amino acids or mixtures, it is less clear for unspecified blends or non-essential amino acids alone. The majority of studies focus on EAAs or BCAAs rather than unspecified mixtures. Overall, the use of amino acids to support bodybuilding is grounded in scientific research, particularly for muscle hypertrophy, recovery, and reduced muscle soreness, and is considered a validated approach when specific amino acids or well-formulated blends are used.

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