How Alcohol Can Quietly Damage Your Liver

Alcohol-related liver disease happens when long-term heavy drinking damages the liver. It’s the leading cause of liver disease and liver-related death in the US and Europe, and it’s now the most common reason people need a liver transplant. The tricky part is that it often causes no symptoms until real damage has already been done. Here’s what the condition is, who’s at risk, and what can be done about it.

How Much Drinking Puts Your Liver at Risk?

Risk goes up with regular, long-term drinking above certain amounts. For women, that’s more than about 1.4 standard drinks a day. For men, it’s more than about 2.1 standard drinks a day. A standard drink is about 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of liquor.

Drinking amount isn’t the only thing that matters. Your risk is also higher if you are a woman, are older, are obese, have type 2 diabetes, smoke, have viral hepatitis, or have conditions sometimes grouped together as metabolic syndrome — high blood pressure, high blood sugar, high cholesterol, and extra weight around the belly. Certain genes that affect how fat builds up in the liver can raise risk too. Worldwide, about 3.5% of people have alcohol-related liver disease, but the number is far higher — more than half — among people with alcohol use disorder, a condition marked by intense cravings and drinking that causes real problems in daily life.

What Are the Warning Signs?

Liver damage from alcohol usually starts as fatty liver, then can progress to scarring (called fibrosis), and eventually to severe scarring (cirrhosis) after years or decades of heavy drinking. Cirrhosis can lead to liver failure and raises the risk of liver cancer.

The problem is that 90% of people with early liver damage have no symptoms at all, or only vague ones like feeling tired. That’s why paying attention to drinking habits matters even before symptoms show up. If the disease progresses to alcohol-associated hepatitis — inflammation of the liver — symptoms can include fever, nausea, vomiting, poor appetite, belly pain, and yellowing of the skin or eyes (jaundice). With cirrhosis, symptoms can become more serious: swelling from fluid in the belly, bleeding in the digestive tract, confusion, and severe jaundice.

How Do Doctors Check for It?

Doctors often start with a simple screening tool called the Fibrosis-4 score, or FIB-4. It estimates your risk of liver scarring using your age and results from routine blood tests you may already get at a checkup. If that score is elevated, the next step is usually an imaging test called vibration-controlled transient elastography — essentially a specialized liver ultrasound that shows how much scarring is present.

Can the Damage Be Treated or Reversed?

The main goal of treatment is stopping alcohol use completely. For people who are still drinking, doctors can offer behavioral therapy (like motivational counseling or cognitive behavioral therapy) and medications such as baclofen or naltrexone to help reduce alcohol intake. People with alcohol use disorder should be considered for referral to an addiction specialist. Those with severe alcohol-associated hepatitis or liver failure may need to be evaluated for a liver transplant.

Managing related health conditions matters too. Diabetes, obesity, high blood pressure, and other parts of metabolic syndrome can speed up liver scarring, so keeping these under control is part of protecting the liver.

The encouraging news: stopping alcohol use can actually reverse fatty liver and early scarring, and it lowers the risk of liver complications and death. On the other hand, people who keep drinking — even small amounts — have higher rates of liver failure and death. What you do from here genuinely changes the outcome.

What Should You Do Next?

If you drink regularly and fall above the amounts described here, or if you have conditions like diabetes, high blood pressure, or high cholesterol alongside regular drinking, it’s worth talking with your primary care team about your liver health. Routine blood work done at a wellness visit can be a starting point for a Fibrosis-4 score, and your provider can also help you manage the conditions that raise the risk of liver scarring getting worse.

Source: Walter KL. “What Is Alcohol-Related Liver Disease?” JAMA Patient Page, JAMA, published online August 19, 2026. doi:10.1001/jama.2026.13459