Abstract
BackgroundA protein intake of 30‐40 g per meal is suggested to maximally stimulate muscle protein synthesis in older adults and could therefore contribute to the prevention of sarcopenia. Protein intake at breakfast and lunch is often low and offers a great opportunity to improve daily protein intake. Protein, however, is known for its satiating effects. Therefore, we explored the association between the amount of protein intake at breakfast and lunch and total daily protein intake in older adults.MethodsProtein intake was assessed by a 3‐day food record in 498 community dwelling older adults (≥55 years) participating different lifestyle interventions. Linear mixed model analysis was used to examine the association between protein intake at breakfast or lunch and total daily protein intake, adjusted for sex, age, body mass index, smoking status, study and total energy intake.ResultsAfter adjustment for potential confounders, a 10 g higher protein intake at breakfast was associated with a 3.2 g higher total daily protein intake (P = 0.008) for males and a 4.9 g (P < 0.001) higher total daily protein intake for females. A 10 g higher protein intake at lunch was associated with a 3.7 g higher total daily protein intake (P < 0.001) for males, and a 5.8 g higher total daily protein intake (P < 0.001) for females.ConclusionsA higher protein intake at breakfast and lunch is associated with a higher total daily protein intake in community dwelling older adults. Stimulating a higher protein intake at breakfast and lunch might represent a promising nutritional strategy to optimise the amount of protein per meal without compromising total daily protein intake.
Highlights
Our society is ageing rapidly [1]
Increasing dietary protein intake has been suggested as important beneficial strategy for preventing and/or treat sarcopenia in older adults [4,5]
**MPS: n fat free mass, fat mass and body fat percentage = 70, n smoking status = 74. ††WelPrex study: n fat free mass, fat mass and body fat percentage and waist circumference = 92. ‡‡PROBE study: n waist circumference = 117. §§VITAMIN study: n fat free mass, fat mass and body fat percentage = 198, n smoking status = 209. After adjustment for these potential confounders, a 10 g higher protein intake at breakfast was associated with a 3.2 g higher total daily protein intake (P = 0.007) corresponding to a higher total daily protein intake for males of 0.02 g kg BWÀ1 (P = 0.048) or 0.03 g kg adjusted BWÀ1 (P = 0.045)
Summary
Our society is ageing rapidly [1]. Ageing is associated with loss of muscle mass, strength and performance, a process termed sarcopenia. Increasing dietary protein intake has been suggested as important beneficial strategy for preventing and/or treat sarcopenia in older adults [4,5]. A protein intake of 30-40 g per meal is suggested to maximally stimulate muscle protein synthesis in older adults and could contribute to the prevention of sarcopenia. We explored the association between the amount of protein intake at breakfast and lunch and total daily protein intake in older adults. Conclusions: A higher protein intake at breakfast and lunch is associated with a higher total daily protein intake in community dwelling older adults. Stimulating a higher protein intake at breakfast and lunch might represent a promising nutritional strategy to optimise the amount of protein per meal without compromising total daily protein intake
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