Synopsis

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

Whey protein is scientifically validated as a nutritional supplement in the context of convalescence (the recovery period following illness, injury, or surgery). Numerous clinical studies and systematic reviews support the use of whey protein to help accelerate recovery, preserve or rebuild lean body mass, and support immune function during convalescence. Whey is a high-quality, rapidly absorbed protein source rich in essential amino acids and branched-chain amino acids (notably leucine), which are critical for muscle protein synthesis and tissue repair. Several randomized controlled trials have demonstrated improved nitrogen balance, increased muscle mass retention, and better functional outcomes in hospitalized or recovering patients—especially older adults or those with chronic diseases—when whey protein supplementation is provided as part of nutritional support.

Additionally, whey protein has been shown to modulate immune responses and reduce inflammation, which may further assist recovery. International guidelines on clinical nutrition (e.g., ESPEN, ASPEN) often recommend high-protein oral nutritional supplements, including those based on whey, for patients recovering from illness or surgery. While not all convalescent patients require supplemental protein, the scientific consensus supports its use when dietary intake is inadequate or muscle wasting is a concern.

In summary, there is robust scientific evidence underpinning the use of whey protein in convalescence, particularly for supporting muscle maintenance, functional recovery, and immune health.

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