Synopsis

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

Animal protein is used with scientific support in the management of Failure to Thrive (FTT), particularly in pediatric and geriatric populations. FTT is characterized by inadequate weight gain or growth, often due to insufficient caloric or protein intake. Numerous clinical guidelines and studies emphasize the importance of adequate protein—both in quantity and quality—for supporting catch-up growth and restoring lean body mass in individuals with FTT.

Animal proteins, including those from meat, dairy, and eggs, are considered high-quality because they contain all essential amino acids in proportions optimal for human growth and maintenance. Research demonstrates that dietary interventions increasing animal protein lead to improved weight gain, muscle mass, and growth metrics in children and adults with FTT compared to diets relying solely on plant-based proteins. For example, the World Health Organization and the American Academy of Pediatrics recommend including animal-based foods as part of nutritional rehabilitation for children with FTT when culturally and economically feasible.

While the fundamental role of protein in growth and tissue repair is well established, specific studies show that animal protein sources are more effective than plant sources in stimulating growth in malnourished populations. This has led to the routine inclusion of animal protein in medical foods and nutritional supplements designed for FTT. However, the evidence is largely based on the collective benefit of high-quality protein rather than on specific animal-derived ingredients, and the degree of benefit may vary depending on individual health status and dietary context.

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