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

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Synopsis

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

Hydrolyzed protein refers to proteins that have been enzymatically or chemically broken down into smaller peptides and amino acids. It is commonly used in nutritional supplements and clinical nutrition, including for individuals experiencing muscle wasting, poor muscle tone, or conditions like sarcopenia. The rationale is that hydrolyzed proteins are more easily digested and absorbed compared to intact proteins, allowing for more rapid delivery of amino acids to muscle tissue. Several clinical studies support the ability of hydrolyzed proteins—particularly hydrolyzed whey or casein—to stimulate muscle protein synthesis, especially when combined with resistance exercise or in populations with impaired digestion or absorption (such as elderly or hospitalized patients).

However, the evidence is moderate: while hydrolyzed protein can support muscle maintenance and recovery, there is limited direct research on its use specifically for "muscle tone" (defined as the continuous and passive partial contraction of the muscles). Most studies focus on muscle mass and strength rather than tone per se. Overall, hydrolyzed protein is scientifically justified for improving muscle protein synthesis and may be beneficial in conditions involving muscle loss or poor muscle function, but its impact on muscle tone specifically is inferred rather than directly proven.

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