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Macronutrient intake and frailty: the Rotterdam Study.

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|November 16, 2019
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Higher animal protein intake is linked to increased frailty over time in adults. Reducing animal protein may improve health status, especially in healthier populations.

Keywords:
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Area of Science:

  • Gerontology and Nutritional Science
  • Longitudinal Health Outcomes Research

Background:

  • Frailty is a significant predictor of adverse health outcomes in older adults.
  • Dietary macronutrient composition is a modifiable factor that may influence frailty.
  • Understanding the relationship between diet and frailty is crucial for public health interventions.

Purpose of the Study:

  • To examine the longitudinal association between dietary macronutrient intake and the development of frailty.
  • To investigate if different macronutrients (carbohydrates, fat, protein) have distinct effects on frailty progression.

Main Methods:

  • Analysis of data from 5205 Dutch adults in the Rotterdam Study.
  • Frailty assessed using a validated frailty index (38 deficits) at baseline and after 11 years.
  • Macronutrient intake evaluated via food-frequency questionnaires; statistical analysis using multivariable linear regression, adjusted for confounders and stratified by BMI.

Main Results:

  • No significant association found between carbohydrate or fat intake and frailty progression.
  • A significant positive association observed between increased animal protein intake and increased frailty over time (10g increase in protein associated with higher frailty score).
  • This association was primarily driven by animal protein, independent of whether it replaced carbohydrates or fat.

Conclusions:

  • Reducing animal protein intake may be beneficial for maintaining health status and potentially reducing frailty in relatively healthy populations.
  • Further research is warranted to determine optimal dietary macronutrient composition for frailty prevention, particularly in more vulnerable groups.