Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Peptides, particularly those derived from proteins such as collagen, whey, or casein, have been studied for their role in supporting muscle health and function. Scientific evidence suggests that certain bioactive peptides can stimulate muscle protein synthesis, enhance recovery after exercise, and reduce muscle breakdown. For example, branched-chain amino acid (BCAA) peptides and collagen peptides have been shown to improve muscle mass and strength, especially when combined with resistance training.

Numerous clinical trials have investigated the effects of peptide supplementation—mainly in the form of hydrolyzed proteins—on muscle growth, recovery, and maintenance. For instance, studies have demonstrated that supplementation with whey peptides post-exercise increases muscle protein synthesis rates more effectively than whole protein or amino acids alone. Collagen peptides have also been associated with increased muscle mass and improved body composition in elderly populations.

However, the term "Peptide (unspecified)" is broad, and the specific effects depend heavily on the peptide's origin, structure, and amino acid sequence. Not all peptides have demonstrated benefits for muscle health, and the strength of evidence varies. While scientific validation exists for certain peptides, the quality and applicability of evidence to an "unspecified" peptide is moderate, warranting a rating of 3 out of 5. Further research is needed to clarify the benefits of individual peptides for muscle support.

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