Your liver handles over 500 functions, from filtering toxins to processing nutrients, and keeping it healthy comes down to a handful of consistent habits. The most impactful steps are maintaining a healthy weight, staying active, eating well, limiting alcohol, and being cautious with medications and supplements. Here’s what each of those looks like in practice.
What Your Liver Is Up Against
The most common liver threat today isn’t alcohol. It’s metabolic dysfunction-associated steatotic liver disease, or fatty liver disease, which develops when fat accumulates in the liver due to obesity, type 2 diabetes, high cholesterol, or high blood pressure. An estimated one in three adults in the U.S. has some degree of it, and most don’t know because it rarely causes symptoms until significant damage has occurred.
Poor sleep, chronic stress, and smoking all compound the problem. Sleep disorders like insomnia and obstructive sleep apnea, along with poor sleep quality or sleeping too little or too much, independently raise the risk of fatty liver disease. Smoking directly accelerates liver scarring and increases liver cancer risk. Chronic stress raises body-wide inflammation, which can worsen liver damage that’s already underway.
Lose Even a Small Amount of Weight
If you carry extra weight, even modest losses make a measurable difference. Losing just 5% of your body weight reduces total liver fat. Losing 7% to 10% goes further, reducing liver inflammation and improving scarring. If you’re not overweight, losing up to 3% of body weight can still benefit your liver. For someone who weighs 180 pounds, that’s roughly 5 to 9 pounds for the smaller target and 13 to 18 pounds for the larger one.
Build Your Diet Around Plants and Fish
A Mediterranean-style eating pattern is the most studied dietary approach for liver health. It emphasizes fruits, vegetables, whole grains, legumes, nuts, olive oil, and fatty fish. The high fiber content from plant foods helps stabilize blood sugar and improve insulin sensitivity, which directly prevents excess fat from building up in the liver.
Omega-3 fatty acids from fatty fish like salmon and mackerel deserve special attention. They reduce inflammation and have been shown to lower liver fat content and improve liver enzyme levels. You don’t need supplements to get this benefit. Two to three servings of fatty fish per week covers it.
What to cut back on matters too. Refined carbohydrates, added sugars (especially from sweetened drinks), and saturated fats all push the liver toward fat accumulation. Processed foods and fast food often contain PFAS, a group of synthetic chemicals found in grease-resistant wrappers, microwave popcorn bags, pizza boxes, and candy wrappers. Research from the NIH has linked these chemicals to liver damage, so reducing packaged and fast food does double duty.
Get 150 Minutes of Exercise Per Week
The standard recommendation of 150 minutes of moderate-intensity aerobic exercise per week significantly reduces liver fat. In one study, 39% of people who hit that threshold achieved a clinically meaningful improvement, defined as at least a 30% reduction in liver fat, compared to only 26% of those who exercised less. Brisk walking or light cycling for 30 minutes a day, five days a week, meets the criteria. You don’t need intense gym sessions. Consistency matters more than intensity.
Know Your Alcohol Limits
There is no amount of alcohol that’s definitively “safe” for the liver, but risk increases substantially beyond certain thresholds. The established guidance, reaffirmed by liver specialists despite recent changes to federal dietary guidelines, remains no more than two drinks per day for men and one for women. Staying within those limits doesn’t eliminate risk, but it keeps it small.
If you already have fatty liver disease, the calculus changes. Even low levels of alcohol increase the risk of serious liver problems and liver cancer in people with existing liver fat. For anyone in that category, avoiding alcohol entirely is the recommendation.
Drink Coffee
Coffee is one of the few things you can add to your routine that actively protects the liver. The data is striking: compared to people who never drink coffee, those who drink two cups a day have roughly a 77% lower risk of liver cirrhosis. At three cups, the risk drops by about 79%, and at four or more cups, by 84%. Caffeine appears to work by blocking certain cell receptors that, when activated, promote inflammation and scarring in liver tissue. Both regular and decaf coffee offer some benefit, though the effect is stronger with caffeinated versions.
Be Careful With Medications and Supplements
Acetaminophen (the active ingredient in Tylenol and many cold medications) is the leading cause of acute liver failure in the U.S. The maximum safe dose for adults is 4,000 milligrams per day across all medications you’re taking, and many people unknowingly exceed it because acetaminophen shows up in dozens of combination products. Check ingredient labels on cold medicines, sleep aids, and pain relievers. If you drink alcohol regularly, your safe threshold is lower.
Herbal and dietary supplements are a growing cause of liver injury, and many people assume “natural” means safe. Green tea extract, commonly marketed for weight loss, has been reported to cause acute liver injury and even liver failure. Garcinia cambogia, another popular weight-loss supplement, has been repeatedly linked to significant liver damage. Ashwagandha, widely used for stress and sleep, has recently been associated with liver injury. Turmeric and curcumin supplements, particularly concentrated formulations, have been tied to outbreaks of acute hepatitis. Kratom, kava kava, and black cohosh are also well-documented causes of liver toxicity.
A review of the medical literature found 79 individual herbal products associated with liver injury. The risk is highest with concentrated extracts and multi-ingredient formulations where doses are hard to track. If you take supplements, tell your doctor, and be especially cautious with anything marketed for weight loss or energy.
Get Vaccinated and Screened
Hepatitis A and hepatitis B are viral infections that directly attack the liver, and both are preventable with vaccines. The CDC recommends hepatitis B vaccination for all adults aged 19 to 59, and for adults 60 and older who have risk factors or simply want protection. The vaccine requires two or three doses depending on the formulation.
Screening matters too. The CDC recommends that all adults who haven’t been previously screened get a one-time blood test for hepatitis B, regardless of risk factors. Hepatitis C, which has no vaccine, is also worth screening for. A simple blood test can catch it, and modern treatments cure it in most cases before permanent liver damage occurs.
Track Your Liver Enzymes
A standard blood panel can reveal early signs of liver stress before you feel anything. The two key markers are ALT (7 to 55 units per liter is the normal range) and AST (8 to 48 units per liter). These ranges may vary slightly between labs and are somewhat different for women and children. Elevated levels don’t necessarily mean serious disease, but persistently high readings signal that something is irritating your liver, whether that’s medication, alcohol, excess weight, or an underlying condition. A routine physical with bloodwork is enough to catch this early.