Effects of dietary protein intake on body composition changes after weight loss in older adults: A systematic review and meta-analysis

Jung Eun Kim, Lauren E. O'Connor, Laura P. Sands, Mary B. Slebodnik, Wayne W. Campbell

Research output: Contribution to journalReview articlepeer-review

97 Scopus citations

Abstract

Context: The impact of dietary protein on body composition changes after older adults purposefully lose weight requires systematic evaluation. Objective: This systematic review and meta-analysis assessed the effects of protein intake (<25% vs ±25% of energy intake or 1.0 g/kg/d) on energy restriction-induced changes in body mass, lean mass, and fat mass in adults older than 50 years. Data Sources: PubMed, Cochrane, Scopus, and Google Scholar were searched using the keywords "dietary proteins," "body composition," "skeletal muscle," and "muscle strength." Study Selection: Two researchers independently screened 1542 abstracts. Data Extraction: Information was extracted from 24 articles. Data Synthesis: Twenty randomized control trials met the inclusion criteria. Conclusion: Older adults retained more lean mass and lost more fat mass during weight loss when consuming higher protein diets.

Original languageEnglish (US)
Pages (from-to)210-224
Number of pages15
JournalNutrition reviews
Volume74
Issue number3
DOIs
StatePublished - Mar 2016

Keywords

  • Aging
  • Body composition
  • Obesity
  • Protein

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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