SARCOPENIA, an age-related condition marked by the progressive loss of muscle mass and strength, significantly increases the risk of falls, fractures, disability, and even mortality. A key factor contributing to its development is inadequate protein intake, especially in older adults who suffer from anabolic resistance – making it harder for their bodies to respond to dietary protein. Despite recommendations suggesting protein intakes of 1.2–1.5 g/kg of body weight per day for individuals with sarcopenia, many older adults fail to meet this due to appetite loss, dental issues, and intolerance to certain protein supplements.
A recent study aimed to assess how accurately protein intake can be measured in sarcopenic older adults living in the community, comparing two methods: 24-hour urine nitrogen analysis (the ‘gold standard’) and a combination of food diaries with weighed protein powders. Findings showed a moderate correlation between the two, but a wide range of agreement, suggesting high variability.
Urine sampling offers precision but is difficult for older adults to comply with, due to physical and cognitive challenges. On the other hand, food diaries and weighed powders are more user-friendly but subject to recall bias and inaccuracies. The study found that while personalised protein supplementation increased intake, many participants still failed to meet the recommended levels. Only one in 50 participants consistently consumed their prescribed protein dosage, often citing issues with the powder’s taste or texture.
The research highlights the need for more practical, palatable protein solutions, such as enriched soups or liquid supplements, which may enhance adherence. Although both assessment methods have limitations, using them in tandem could provide a balanced approach to dietary monitoring.
This pioneering study provides valuable insights into dietary assessment techniques in older adults with sarcopenia and underscores the importance of personalised, tolerable supplementation strategies.
Reference
Amini N et al. Estimating protein intake in sarcopenic older adults: combining food diaries and weighed powders versus 24-hour urine collections. J Nutr Health Aging. 2025;29(3):100474.
