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

5 Repeated evidence

How much this weighs: several studies in people, combined — the strongest kind of evidence there is.

Type of study: meta-analysis or systematic review
Studied in: people
Participants: not stated in the abstract
Published: 2016 in Nutrition reviews
Cited: 130 times by other research
Who paid: Not declared. PubMed carries no conflict-of-interest statement for most articles; that is not the same as independent.
Source: PubMed 26883880 · doi 10.1093/nutrit/nuv065

The plain-language write-up of this study is still being written. Below is the abstract exactly as the researchers published it.

Abstract by the researchers — original text

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.