Greater Leucine Content Enhances the Acute and Integrated Muscle Protein Synthetic Responses Versus an Isonitrogenous, Isoenergetic Protein Beverage in Healthy Older Women

A decreased anabolic response to protein feeding is one of the mechanisms that underpins sarcopenic muscle loss with aging, with older adults requiring a higher protein dose than younger adults to increase muscle protein synthesis (MPS). Despite this knowledge, a number of commercially available protein beverages targeted to increase protein intake and support lean body mass in older adults contain ≤20 g of protein, and their ability to …