The Keto Diet for Fatty Liver? Fat Loss Is Not the Same as Liver Healing

A low-carbohydrate diet focuses on reducing carbohydrate intake, commonly to less than about 130 grams a day. A ketogenic diet is also low carbohydrate but uses much more severe carbohydrate restriction, usually about 20 to 50 grams a day. This more severe restriction forces our metabolism to shift from primarily using glucose for fuel toward greater use of fat, which in turn increases blood ketone levels.

A ketogenic diet appears to be quite effective at getting fat out of a fatty liver. In a 2026 study, people on ketogenic and non-ketogenic diets had similar calorie deficits and body-fat loss, but liver fat fell 29% with the ketogenic diet compared with 20% with the non-ketogenic diet.

For someone with uncomplicated fatty liver, without evidence of significant liver injury or fibrosis, particularly if they are obese, have high triglycerides, or have insulin resistance, a ketogenic diet can be a reasonable short-term option.

But fatty liver and steatohepatitis are not the same disease. Simple fatty liver, MASLD, means there is too much fat stored in the liver. MASH means liver-cell injury and inflammation are also present, presumably as part of the liver's response to metabolic stress associated with excess fat. Getting fat out of the liver does not necessarily mean that this liver injury is healing.

While we currently have good evidence that ketogenic diets reduce liver fat, the evidence is much weaker that they reverse the inflammation, cell injury, and fibrosis of MASH.

There is another reason for caution. In the 2026 study, the ketogenic diet reduced liver fat particularly well but also produced changes in liver mitochondrial metabolism that could theoretically be unfavorable in an already damaged liver. That does not prove that ketogenic diets damage people with MASH. But it does mean we should not assume that less liver fat automatically means a healthier liver, particularly in someone who already has significant fibrosis.

The practical message is fairly simple. For uncomplicated fatty liver, a ketogenic diet can rapidly reduce liver fat, although it is certainly not the only way. But once fatty liver has progressed to MASH or significant fibrosis, the goal is no longer simply removing fat. We need to reduce liver-cell injury and inflammation and prevent or reverse fibrosis. Treating MASH requires more than making liver fat disappear. Success requires focusing on the underlying metabolic reason the fat accumulated in the first place - insulin resistance.

For the long term, the dietary goal should be a healthy eating pattern that you can maintain. A less restrictive low-carbohydrate diet combined with weight loss and exercise, may be slower than a ketogenic diet, but long-term success depends on a diet you can maintain month after month and year after year. Small changes over time. One small step at a time.