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Various aspects of protein intake are thought to be crucial for the prevention of sarcopenia in older adults. Information about the day-to-day variation in these aspects is lacking. Our objective was to examine whether daily protein intake, protein distribution across meals, number of meals providing adequate protein, and protein sources vary across the week in healthy community-dwelling older adults. In 140 persons (51% women) that were aged 75⁻85 years, protein intake was assessed by seven-day food records. On average across the week, protein intake (median [IQR]) was 0.93 [0.79⁻1.10] g/kg body weight (BW) and the coefficient of variation across the three main meals was 0.50 [0.40⁻0.61]. The number of meals per day providing ≥0.4 g protein/kg BW was 0.57 [0.43⁻1.00] and 60.0 [52.4⁻65.2]% of protein intake was animal-based. According to Friedman's test, differences throughout the week were observed in women for daily protein intake ( p = 0.038; Sunday: 0.99 [0.78⁻1.31] vs. Tuesday: 0.79 [0.68⁻1.12] g/kg BW) and number of meals with adequate protein ( p = 0.019; ≥1 daily meal: Sunday: 69.4% vs. Tuesday: 41.7%). On Sunday, protein intake was most in agreement with suggestions to prevent sarcopenia. In men, protein intake did not differ throughout the week.

Do Aspects of Protein Intake Vary Across the Week in Healthy Community-Dwelling Older Adults?—An enable Study