Research
Micronutrients & recovery
High intake of branched-chain amino acids (BCAAs) combined with a high-fat (western) diet may exacerbate metabolic disease risk by interfering with fatty acid oxidation and causing mitochondrial stress.
If you are eating a high-fat diet, be cautious with high BCAA intake or high-protein supplements, as this combination may worsen metabolic health. Prioritize reducing dietary fat before adding high levels of BCAAs.
ModerateQualifiesMEDIUM confidence
Metabolomics studies revealed that high intake of branched-chain amino acids (BCAAs, Valine, Leucine, Isoleucine) and aromatic amino acids (Phenylalanine, Tyrosine) may be associated with the development of metabolic diseases [80]. Importantly, this only occurs in combination with a high-fat diet.
Why this rating
Based on metabolomics studies and animal models cited in a review.
Source
A high-protein diet for reducing body fat: mechanisms and possible caveats
Dominik Pesta et al. · Nutrition & Metabolism · 2014
DOI 10.1186/1743-7075-11-53
narrative_reviewCited 263×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- High-protein diets (exceeding 0.8 g/kg BW) promote weight loss and fat mass reduction primarily by increasing satiety through anorexigenic hormones (GLP-1, CCK, PYY) and decreasing orexigenic hormones (ghrelin), while simultaneously increasing energy expenditure via the thermic effect of food (DIT).Good
- Excess protein intake, particularly when energy demand is low, can be converted to glucose or ketone bodies, potentially contributing to a positive energy balance and hindering weight loss.Moderate
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