Evidence supporting the use of: Whey protein
For the health condition: Weight Gain

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Synopsis

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

Whey protein is scientifically validated as a useful supplement to support weight gain, particularly in individuals seeking to build muscle mass or recover from undernutrition. Whey is a high-quality, fast-digesting protein derived from milk, containing all essential amino acids needed for muscle protein synthesis. Several clinical studies show that supplementing with whey protein, especially when combined with resistance training, leads to increased muscle mass and, consequently, overall body weight. This is because protein provides the necessary building blocks for muscle growth and repair, and adequate protein intake is often challenging to achieve through whole foods alone, especially for those with higher caloric needs or poor appetite.

Meta-analyses and randomized controlled trials have demonstrated that whey protein supplementation can significantly enhance lean body mass gains in both healthy individuals and those recovering from illness or malnutrition. Furthermore, in populations such as elderly adults or patients with cachexia, whey protein may help prevent muscle wasting and promote healthier weight gain. While whey protein alone does not typically contribute to significant fat gain, when included as part of a calorie-surplus diet, it helps increase total body weight primarily through muscle accretion. Thus, the use of whey protein for supporting weight gain is grounded in robust scientific evidence, with particular efficacy noted when combined with adequate caloric intake and resistance exercise.

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