Research
Mixed
Lean MASLD (normal BMI but with metabolic dysfunction) is a distinct phenotype driven by sarcopenia, adverse fat distribution, and genetic susceptibility, requiring different treatment strategies than obesity-driven MASLD.
If you have a normal BMI but metabolic issues (like high blood sugar or blood pressure), you can still develop fatty liver disease. This 'lean MASLD' is often linked to low muscle mass and genetics. Focus on building muscle and managing metabolic health rather than just losing weight.
GoodQualifiesHIGH confidence
Lean MASLD is more commonly observed in certain Asian and other populations and is often associated with genetic susceptibility, sarcopenia and adverse fat distribution despite a normal body mass index and should not be considered a benign phenotype
Why this rating
Supported by population-based studies and genetic association studies.
Source
Obesity and Metabolic Dysfunction‐Associated Steatotic Liver Disease ( <scp>MASLD</scp> ): A Literature Review on Pathophysiology and Treatment
Michael Romanos et al. · Diabetes Obesity and Metabolism · 2026
DOI 10.1111/dom.70659
narrative_reviewCited 1×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Weight loss of 7-10% is required to resolve steatohepatitis (MASH) and regress fibrosis, whereas 5% loss primarily improves steatosis.Strong
- GLP-1 receptor agonists (semaglutide 2.4 mg weekly) and dual incretin agonists (tirzepatide) significantly reduce hepatic steatosis and improve or resolve steatohepatitis (MASH) in patients with MASLD, primarily through sustained weight loss and improved insulin sensitivity.Good
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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