Evidence supporting the use of: Protein (unspecified)
For the health condition: Muscle Tone (lack of)

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Synopsis

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

Protein supplementation is scientifically validated as a strategy to support muscle tone, especially in cases of muscle wasting, weakness, or decreased muscle mass (sarcopenia). Muscle tone, defined as the continuous and passive partial contraction of the muscles, is dependent on adequate muscle mass, which in turn requires sufficient protein intake for maintenance and repair. Numerous clinical trials and meta-analyses have demonstrated that increased dietary protein—whether from food or supplements—can help improve muscle mass, strength, and function in both healthy adults and populations at risk for muscle loss (such as the elderly, those recovering from illness, or individuals with malnutrition). The mechanism is well understood: dietary protein provides essential amino acids required for muscle protein synthesis. Without adequate protein, muscle breakdown exceeds muscle building, leading to decreased muscle mass and tone. Professional organizations, including the European Society for Clinical Nutrition and Metabolism (ESPEN) and the American College of Sports Medicine (ACSM), recommend higher protein intakes for older adults and those engaged in resistance training to preserve or enhance muscle tone and mass. While protein alone is not sufficient to correct neurological causes of low muscle tone (hypotonia), in cases where muscle tone is reduced due to undernutrition or muscle atrophy, protein supplementation is an evidence-based intervention.

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