Several vitamins and nutrients show real benefits for fatty liver, but vitamin E has the strongest clinical evidence. In a major trial, 800 IU per day of vitamin E resolved liver inflammation in 42% of participants compared to 19% on placebo. Beyond vitamin E, maintaining adequate levels of vitamin D, B12, folate, choline, and omega-3 fatty acids all play meaningful roles in protecting your liver from further damage.
Fatty liver disease, now officially called metabolic dysfunction-associated steatotic liver disease (MASLD), affects roughly one in four adults worldwide. The condition ranges from simple fat accumulation in liver cells to active inflammation and scarring, a more serious stage called MASH. Where you fall on that spectrum determines which nutrients matter most.
Vitamin E: The Strongest Evidence
Vitamin E is the only vitamin specifically recommended in clinical guidelines for fatty liver with active inflammation. In the PIVENS trial, participants took 800 IU daily of the natural form (called RRR alpha-tocopherol) for 96 weeks. The results were striking: for every 4.4 patients treated, one achieved meaningful improvement in liver tissue that wouldn’t have happened with placebo alone. That’s a strong effect for a supplement.
There’s an important catch. This recommendation applies specifically to adults without diabetes who have biopsy-confirmed inflammation and scarring, not simple fat accumulation. If your liver has fat but no active inflammation, vitamin E hasn’t been shown to help in the same way. The guidelines from the American Association for the Study of Liver Diseases note that risks and benefits should be weighed individually, partly because of a safety concern: a large cancer prevention trial found that men taking 400 IU of vitamin E daily had a 17% higher rate of prostate cancer over seven years. That translated to about 11 extra cases per 1,000 men. The risk was even higher in men who started the trial with low selenium levels, where the chance of aggressive prostate cancer doubled.
For women and for men without elevated prostate cancer risk, the calculus may look different. But this is a supplement where the dose matters and more is not better.
Vitamin D and Liver Scarring
Low vitamin D levels show up consistently in people with fatty liver disease, and the lower the levels, the worse the liver tends to look. In a study of 207 patients with chronic liver disease, those with severe vitamin D deficiency (below 10 ng/mL) were 3.5 times more likely to have advanced liver scarring compared to those with adequate levels. That association held even after accounting for other risk factors like diabetes.
Whether taking vitamin D supplements can reverse or slow liver damage is less clear. The correlation is strong, but people with fatty liver also tend to be overweight, sedentary, and insulin resistant, all of which independently lower vitamin D. Still, maintaining adequate vitamin D levels (most labs define this as above 30 ng/mL) is reasonable given its broad metabolic benefits. A simple blood test can tell you where you stand.
B12 and Folate: Lowering a Hidden Risk Factor
Vitamin B12 and folate work together to clear homocysteine from your blood. Homocysteine is an amino acid that, when it builds up, directly worsens liver inflammation and scarring. Clinical studies consistently show that higher homocysteine levels correlate with more severe fatty liver disease, while higher B12 and folate levels correlate with less severe disease.
The mechanism is now fairly well understood. Excess homocysteine interferes with your liver cells’ ability to break down fat and clear out damaged components. B12 and folate help convert homocysteine back into methionine, a harmless amino acid your body can use. In animal studies with established liver inflammation, supplementing B12 and folate lowered homocysteine levels, restored the liver’s fat-burning capacity, and improved liver tissue appearance. Researchers have suggested B12 and folate could eventually become a first-line treatment for the inflammatory stage of fatty liver disease.
You can get B12 from meat, fish, eggs, and dairy. Folate is abundant in leafy greens, legumes, and fortified grains. People on plant-based diets, those over 50 (who absorb B12 less efficiently), and anyone taking acid-reducing medications are at higher risk for deficiency.
Choline: The Nutrient Most People Miss
Choline is an essential nutrient that rarely gets attention, but your liver depends on it. Your liver packages fat into particles called VLDL to ship it out into the bloodstream. That packaging process requires a compound made from choline. Without enough choline, fat simply accumulates in liver cells, which is the definition of fatty liver disease.
The adequate intake is 550 mg per day for men and 425 mg per day for women, with higher amounts needed during pregnancy and breastfeeding. Most people fall short. Eggs are the richest common source (one large egg provides about 150 mg), followed by beef liver, chicken, fish, and soybeans. If your diet is low in these foods, choline deficiency could be directly contributing to fat buildup in your liver, regardless of your weight or alcohol intake.
Omega-3 Fatty Acids and Liver Fat
Omega-3 fatty acids, specifically EPA and DHA from fish oil, consistently reduce the amount of fat stored in the liver. A meta-analysis pooling data from multiple trials found a large and statistically significant reduction in liver fat with omega-3 supplementation. The median dose across studies was 4 grams per day of total omega-3s, with individual trials using anywhere from about 0.4 to 4.6 grams of EPA and 0.2 to 2.2 grams of DHA daily.
That 4-gram dose is considerably more than what most over-the-counter fish oil capsules provide (a standard capsule typically contains about 300 mg of combined EPA and DHA). Reaching therapeutic levels usually requires a concentrated prescription formulation or multiple capsules daily. Fatty fish like salmon, mackerel, and sardines are the best food sources, though it’s difficult to reach 4 grams per day through diet alone.
What Matters Most in Practice
No vitamin replaces the fundamentals. Losing 5 to 10% of your body weight remains the most effective intervention for fatty liver, and it works better than any supplement studied to date. Exercise independently reduces liver fat even without weight loss. Cutting back on added sugars, particularly fructose from sweetened beverages, directly reduces the raw material your liver converts to fat.
That said, nutritional gaps can make fatty liver worse or harder to reverse. A practical approach looks like this:
- Vitamin E (800 IU/day) has the strongest evidence but is specifically indicated for the inflammatory stage (MASH) in people without diabetes, and carries prostate cancer risk for men.
- Vitamin D should be tested and corrected if low, given its strong association with liver scarring severity.
- B12 and folate protect against homocysteine-driven inflammation and are safe, inexpensive, and widely available.
- Choline is essential for your liver’s ability to export fat, and most diets don’t provide enough.
- Omega-3s reduce liver fat at doses around 4 grams per day, though that typically requires concentrated supplements.
The stage of your liver disease shapes which of these nutrients matters most. Simple fat accumulation, active inflammation, and established scarring are different problems with different nutritional priorities. Knowing your current liver status through blood work or imaging gives you a clearer picture of where to focus.