The Study
Beneficial Effects of Carbohydrate Restriction in Type 2 Diabetes Can Be Traced to Changes in Hepatic Metabolism
This study watched two groups of people with mild type 2 diabetes who ate different diets. It found that those on a low-carb diet had less liver fat and changes in certain body chemicals that were linked to better insulin levels. But because we don’t know for sure how the groups were picked, we can’t say the diet caused these changes — just that they happened together.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
This study looked at how two different diets affect the liver in adults with mild type 2 diabetes. One diet had very little carbohydrate (keto), and the other had low fat. After 12 weeks, the keto diet helped reduce fat in the liver and lowered a marker of fat production.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 576 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, these changes suggest the liver is working better and making less fat, which is good for people with type 2 diabetes.
- 2Liver fat went down by 28% in the keto group.
- 3Palmitoleic acid, a sign of new fat being made in the liver, dropped by 32%.
- 4Glucagon levels rose by 25% in the keto group.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The Journal of clinical endocrinology and metabolism
Year
2025
Authors
Barbara A Gower, Marian L Yurchishin, Amy M Goss, John Knight, W. T. Garvey
Related Content
Claims (10)
In adults with mild type 2 diabetes, following a ketogenic diet for 12 weeks is linked to a 50% higher C-peptide response after glucose intake, and this is accompanied by lower levels of liver fat and pyruvate.
Your liver makes its own sugar when you don’t eat carbs for a long time, and this process doesn’t hurt your liver or cause damage.
If you have mild type 2 diabetes, cutting carbs way down — even without changing your calorie intake — might cut liver fat by nearly a third in just three months.
In adults with mild type 2 diabetes, lower liver fat is accompanied by a lower glucagon-to-C-peptide ratio, which reflects a change in pancreatic hormone levels tied to better liver metabolism.
In adults with mild type 2 diabetes, following a ketogenic diet for 12 weeks is linked to a 23% drop in serum pyruvate, along with lower liver fat and better beta-cell function, reflecting changes in how the body processes glucose.
In adults with mild type 2 diabetes, following a ketogenic diet for 12 weeks results in a 32% lower level of palmitoleic acid compared to a low-fat diet, which reflects reduced production of new fat molecules by the liver.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.