Question & Context

Fatty liver (MASLD) – what helps?

In brief

With a fatty liver, now called MASLD, weight loss is the strongest lever, and the European guideline names clear thresholds: losing at least 5 percent of body weight reduces liver fat, 7 to 10 percent reduces inflammation, and from 10 percent scarring improves as well. Exercise lowers liver fat even before the scales move much. Cutting sugary drinks and alcohol is part of it. Coffee is linked to less scarring in observational studies. For advanced disease, there are now medicines as a medical option. Among supplements, vitamin E has the best data, while omega-3 and milk thistle remain thin. What matters most is whether the liver is already scarred, and that is easy to check.

What matters first

Lose weight – with clear thresholds

In a study of 293 people with confirmed fatty liver inflammation who changed their lifestyle over 52 weeks, the inflammation resolved in 90 percent of those who lost at least 10 percent of their weight, and scarring regressed in 45 percent. However, only 30 percent managed to lose at least 5 percent. The 2024 European guideline adopts these levels: a sustained 5 percent weight loss for less liver fat, 7 to 10 percent for less inflammation, 10 percent for fibrosis.

Move, even if the scales stay put

A meta-analysis of 12 controlled trials found that regular aerobic or resistance training lowers liver fat, even with minimal or no weight loss and below the usual exercise recommendations for weight loss. Training alone had no measurable effect on the liver enzyme ALT. The guideline recommends more than 150 minutes of moderate or 75 minutes of vigorous activity per week, adapted to what suits you and what you can keep up.

Cut out sugary drinks

According to the guideline, added sugar, especially fructose, plays a major role in the development of fatty liver. In a randomized trial with 40 boys aged 11 to 16, liver fat fell from 25 to 17 percent in 8 weeks on a diet very low in free sugars, compared with only 21 to 20 percent in the control group. The trial was small and short. The guideline nevertheless clearly advises avoiding sugary drinks and limiting ultra-processed foods, with Mediterranean eating as the model.

Leave out alcohol

There is no “healthy glass” with fatty liver. In an observation of 285 people with fatty liver and repeat liver biopsies over a mean of 47 months, liver fat fell less in moderate drinkers with no more than two drinks a day, and the inflammation resolved considerably less often than in people who did not drink. The guideline generally discourages alcohol with fatty liver and advises complete and permanent abstinence with advanced fibrosis or cirrhosis.

When you should have this checked by a doctor

A fatty liver causes no symptoms for a long time and is often only noticed through raised liver enzymes or on ultrasound. Have liver values that stay raised for months checked by a doctor, as well as a fatty liver seen on ultrasound, especially with type 2 diabetes, marked overweight or several metabolic risk factors. The central question then is scarring: the guideline recommends starting with a simple score calculated from blood values and age (FIB-4). If it is above 1.3, or above 2.0 from age 65, further assessment follows, for example elastography, a measurement of liver stiffness by ultrasound. See a doctor immediately if you notice yellowing of the skin or eyes, dark urine, an increasingly swollen belly from fluid build-up, swollen legs, vomiting blood, black stools, new confusion or marked drowsiness, or unintended weight loss. Such signs can point to advanced liver disease.

What happens in the liver

MASLD stands for a fatty liver linked to metabolic risk factors such as overweight, type 2 diabetes, high blood pressure or unfavorable blood lipids; it used to be called NAFLD. According to the European guideline, more than 30 percent of the population worldwide is now affected. For most people, it stays at stored fat. An estimated 10 to 30 percent develop inflammation, called MASH, which over the years can lead to scarring and, in the worst case, cirrhosis.

For the outlook, the fibrosis stage matters most; it is the strongest predictor of liver-related death and liver cancer. But the studies above also show that fat and inflammation can regress, and even fibrosis can improve when weight falls for good. Because fatty liver is closely intertwined with diabetes and cardiovascular risk, blood sugar and the heart usually benefit from the same measures.

Coffee and medicines: what goes beyond lifestyle

Coffee keeps showing up favorably in fatty liver research. In a meta-analysis of 5 studies with 3,752 people with fatty liver, drinking coffee was associated with a lower risk of scarring (odds ratio 0.67). Whether coffee protects against developing fatty liver in the first place remained open in the same paper. The guideline classifies this as an association from observational studies, not a proven effect. The data give no reason to avoid coffee.

For inflammation with scarring, there are now medicines that can only be prescribed by a doctor. Resmetirom acts specifically on a thyroid hormone receptor in the liver. In a trial with 966 patients, the inflammation resolved after 52 weeks in 25.9 and 29.9 percent depending on the dose, compared with 9.7 percent on placebo, and fibrosis improved in 24.2 and 25.9 versus 14.2 percent. In the EU, resmetirom has had a conditional approval since August 2025, for moderate to advanced fibrosis without cirrhosis and in addition to diet and exercise.

In an interim analysis of a phase 3 trial with 800 patients, semaglutide resolved the inflammation in 62.9 percent, compared with 34.3 percent on placebo, and improved fibrosis in 36.8 versus 22.4 percent, with a mean weight loss of 10.5 percent. The guideline names GLP-1-based drugs such as semaglutide and tirzepatide as an option for fatty liver with type 2 diabetes or obesity. Whether one of these medicines is right for you is a question for your GP or a liver clinic.

Vitamin E, omega-3, milk thistle: what the studies show

Vitamin E has the best data among over-the-counter options. In the PIVENS trial with 247 adults with fatty liver inflammation without diabetes, liver histology improved over 96 weeks in 43 percent on vitamin E versus 19 percent on placebo. Fat and inflammation decreased, fibrosis did not. The guideline nevertheless does not recommend vitamin E as a targeted treatment, because large phase 3 trials are missing and there are possible long-term risks. Taking it therefore belongs under medical supervision.

Omega-3 fatty acids show a mixed picture. A meta-analysis of 20 randomized trials with 1,615 participants found an improvement in fat on ultrasound and a lower GGT level, with signs of publication bias. For liver fat measured more precisely by MRI, for liver stiffness and in tissue samples, there was no effect, and adverse events were more frequent. According to the guideline, EPA also did not improve histology in randomized trials.

Milk thistle (silymarin) is considered a classic liver remedy. In a randomized trial with 99 patients with fatty liver inflammation, it missed the primary endpoint over 48 weeks: a clearly lower inflammatory activity was reached by 32.7 versus 26.0 percent on placebo. Fibrosis improved more often, in 22.4 versus 6.0 percent, which the authors themselves consider in need of confirmation. The guideline states that the few small trials do not show histological improvement and does not recommend dietary supplements for fatty liver overall.

What the database says

Sorted by strength of evidence. The BK-Score rates the state of knowledge, not the substance.

Semaglutide (Ozempic / Wegovy) Evidence 10/10 · Well supportedApproved for weight loss with proven cardiovascular benefit; in a large trial, fatty liver inflammation resolved more often on semaglutide than on placebo. Only as a medical option.
Tirzepatide (Mounjaro / Zepbound) Evidence 10/10 · Well supportedApproved on the basis of large trial programs on weight and diabetes; the guideline names GLP-1-based drugs such as tirzepatide as an option for fatty liver with type 2 diabetes or obesity. Prescription only.
Strength training 3× per week Evidence 9/10 · Well supportedStrength training is the best-supported single measure in this database and, in studies, lowers liver fat even without major weight loss.
Cutting down on alcohol Evidence 9/10 · Well supportedDrinking less alcohol is one of the best-supported health levers of all. With fatty liver, the guideline generally discourages alcohol and advises complete abstinence with advanced fibrosis.
Caffeine Evidence 9/10 · Well supportedCaffeine and coffee consumption are well studied in large cohorts and many trials. With fatty liver, coffee is associated with less scarring, a finding from observational studies.
6,000 to 10,000 steps a day Evidence 8/10 · Well supported, heavily overhypedMore everyday movement is clearly associated with better health in large cohorts. For the liver, regular activity counts, not a specific step target.
Vitamin E Evidence 8/10 · Well supported, heavily overhypedThoroughly studied: in the PIVENS trial, vitamin E improved liver histology in fatty liver inflammation, while large safety trials argue against high amounts. The guideline does not recommend it as a targeted treatment.
Phosphatidylcholine Evidence 6/10 · Supported, with caveatsIn fatty liver with metabolic risk factors, it lowered liver fat in a randomized trial, but it did not slow fibrosis in people with alcohol dependence. So far, only a surrogate marker is supported.

Frequently asked questions

Can a fatty liver reverse?

Yes, liver fat and inflammation can regress, often through lifestyle alone. In a study of 293 people with fatty liver inflammation, the inflammation resolved in 90 percent of those who had lost at least 10 percent of their weight, and scarring also regressed in 45 percent. Keeping the weight off is important: the guideline explicitly speaks of a sustained reduction.

How much weight do I need to lose for my liver to benefit?

The 2024 European guideline names three levels for people with overweight: a sustained loss of at least 5 percent of body weight to reduce liver fat, 7 to 10 percent to improve inflammation, and at least 10 percent to improve fibrosis. In a large study, only 30 percent managed at least 5 percent, which is why structured programs with support help.

Does exercise help fatty liver even if I don't lose weight?

Yes. A meta-analysis of 12 controlled trials found less liver fat with aerobic or resistance training, even with minimal or no weight loss. Liver values in the blood did not change measurably from training alone. The guideline recommends more than 150 minutes of moderate or 75 minutes of vigorous activity per week, in whatever form you can keep up regularly.

Is coffee good for the liver?

In observational studies, drinking coffee is associated with less scarring in people with fatty liver; a meta-analysis of 5 studies with 3,752 patients found an odds ratio of 0.67. Randomized trials with hard endpoints are missing, and the guideline treats it as an association. The data give no reason to give up coffee.

Does milk thistle help with fatty liver?

The data are thin. In the largest randomized trial with 99 patients, silymarin missed the primary endpoint over 48 weeks; only fibrosis improved more often than on placebo, a finding the authors say still needs confirmation. The European guideline sees no evidence of histological improvement. Weight loss, exercise and avoiding alcohol are much better supported.

Can I drink alcohol with a fatty liver?

The guideline discourages alcohol with fatty liver and advises complete abstinence with advanced fibrosis or cirrhosis. The data do not support a protective effect of small amounts. In a study with repeat liver biopsies, the inflammation resolved considerably less often in moderate drinkers than in people who did not drink.