Clinical Trial Finds Keto Diet Cuts Liver Fat by 67%, Outperforming Mediterranean Diet for MASLD

At the end of a rigorous clinical trial, the numbers on the scale looked nearly identical across three different dietary groups—but inside the liver, the story was drastically different. Participants adhering to a ketogenic diet saw their liver fat plummet by 67%, a reduction that far outpaced those following a Mediterranean or plant-forward regimen.[1][2]

The findings, published in Cell Metabolism, challenge the long-held assumption that all weight loss is created equal when it comes to internal organ health. Metabolic dysfunction-associated steatotic liver disease (MASLD), previously known as fatty liver disease, affects roughly a third of the global adult population and is a leading driver of chronic health complications.[1][4]

While doctors have traditionally recommended the Mediterranean diet as the gold standard for metabolic health, this trial suggests that severe carbohydrate restriction triggers a specific metabolic pathway that rapidly clears fat deposits from hepatic tissue.[2][4]

Researchers tracked participants who were randomized into three distinct nutritional protocols: a low-carbohydrate ketogenic diet, a Mediterranean diet, and a plant-forward diet. Each group was carefully monitored to ensure adherence to their specific macronutrient guidelines.[3][5]

Over the course of the study, all three groups successfully shed overall body weight at comparable rates, proving that multiple dietary approaches can effectively reduce total body mass when calories are controlled.[1][5]

However, advanced imaging revealed that the keto group experienced a profound 67% decrease in liver fat, compared to much smaller reductions in the other cohorts. This stark contrast highlights the unique metabolic effects of macronutrient composition beyond a simple calorie deficit.[1][5]

For patients grappling with MASLD, these results offer a reassuringly practical takeaway. It indicates that adjusting the specific macronutrient composition of a diet—specifically by drastically lowering carbohydrates and increasing dietary fats—can directly target liver fat even if total weight loss plateaus.[2][6]

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This targeted approach provides a powerful, non-pharmaceutical lever to halt or reverse the progression of liver disease before it advances to cirrhosis or liver failure, giving patients a direct way to take control of their metabolic health.[4][7]

Clinical experts caution that while the ketogenic diet excels at clearing liver fat, it requires strict adherence and may not be suitable for everyone, particularly those with certain pre-existing cardiovascular risks or those who struggle with highly restrictive eating patterns.[1][7]

The Mediterranean diet remains a highly effective, well-rounded approach for general cardiovascular health, but for the specific goal of reversing MASLD, carbohydrate restriction appears to hold a distinct therapeutic advantage.[4][7]