Protein metabolic roles in treatment of obesity.
Level 5 - mechanism / opinion, no new human data
Narrative review describing mechanistic models without new empirical data or systematic review methodology
PubMed 20531180 · doi:10.1097/MCO.0b013e32833a7737
What was done
This narrative review synthesized literature on dietary protein consumption during weight loss, examining the impact of high-quality protein distribution across meals and the role of leucine in regulating muscle protein synthesis.
What was found
The abstract reports no primary experimental numbers or statistical effect sizes. It asserts that a per-meal threshold of 2.5 g of leucine triggers a postprandial anabolic response that preserves metabolically active tissue, and that distributing protein evenly across breakfast and lunch enhances muscle retention and body fat reduction.
Why it matters
It emphasizes that protein timing and reaching specific per-meal leucine thresholds, rather than simply total daily protein intake, may be critical for preserving skeletal muscle during caloric restriction.
Limits
The paper is a narrative review offering mechanism-based reasoning without systematic methodology. The abstract contains no primary data, sample sizes, or quantitative outcome measures from controlled trials.
Cited by
- supports Approximately 2.5 to 3 grams of the amino acid leucine is required per meal to trigger muscle protein synthesis.