Can You Live Without a Liver?

Your liver sits on the upper right side of your belly, right under your ribs. It’s the largest organ inside your body, and it works around the clock to keep you healthy. 

So, can you live without a liver? The short answer is no. You can live with just part of your liver, and the missing part can even grow back. 

In this article, you’ll learn what your liver does, what happens when it fails, how long people have survived without one, and how liver transplants work. 

What Does Your Liver Do? 

Your liver weighs about 3 to 5 pounds (1.4 to 2.3 kilograms). Blood from your stomach and intestines flows through it before reaching the rest of your body.1 

Its main jobs include: 

Your liver is one of the only organs that can grow back.1 

So, Can You Live Without a Liver? 

No, you can’t live without a liver. Your body depends on it too much. Without a liver 2: 

Still, doctors have kept a few people alive for a short time with no liver at all. This can happen when a newly transplanted liver fails and starts harming the patient. Surgeons remove it and keep the person in intensive care until another liver arrives. 

In published reports, this usually lasts an average of about 10 to 48 hours.3 One adult survived 67 hours, and the longest reported case is 99 hours, in a young girl who survived.3 But these patients were sedated, on machines, and waiting for a new organ. 

What Happens When Your Liver Fails? 

Most people never lose their liver to surgery. Instead, the liver stops working, either slowly or all of a sudden. This is called liver failure, and there are two main types. 

Acute liver failure 

Acute liver failure happens fast, often over days or weeks. It usually affects people who had no liver problems before. 

In the United States, the most common cause is an acetaminophen (Tylenol) overdose.2 Many of these overdoses are accidental. People often take two products that both contain acetaminophen, such as a cold medicine and a pain reliever, without realizing it.5 

 Other causes include: 

Chronic liver failure 

Chronic liver failure develops over months or years. Long-term damage scars the liver (cirrhosis) until it can no longer do its job. Common causes include heavy drinking, hepatitis B or C, and fatty liver disease.2 

Signs your liver is failing 

When Do You Need a Liver Transplant?  

You may need a liver transplant when your liver is too damaged to recover, and other treatments no longer help. 

A transplant may be needed for: 7 

In the United States, doctors use a score called MELD, based on blood tests and ranging from 6 to 40, to decide who gets a liver first.8 The higher the score, the sicker the person and the higher their priority. 

The surgeon replaces your damaged liver with a whole liver from someone who has died or part of a liver from a living donor. Transplants work well for most people. About 93 out of 100 people are alive one year after a deceased-donor transplant, and about 80 out of 100 after five years.9 

After a transplant, your immune system may see the new liver as foreign and attack it. This is called rejection. To prevent it, almost all people must take medicines that weaken the immune system’s response for the rest of their lives. This is called immunosuppressive therapy. It lowers the risk of rejection, but it also raises the risk of infections and some cancers.7 

Can You Live With Half a Liver? 

Yes. Many people live normal, healthy lives with half a liver or less. Surgeons consider it safe to leave as little as 20 to 30 percent of a healthy liver.10 11 

That’s why living liver donation is possible. A donor gives about 40 to 60 percent of their liver.  

Will a liver grow back? 

Yes. The remaining cells multiply, and regrowth is fastest in the first three months. In one study of 33 living donors, the liver regained this much of its original size:11 

Even after four years, the liver may not return to its original size.11 Its function, however, recovers much sooner. In a study of 487 U.S. living donors, most routine blood tests of liver function returned to normal within three months of surgery. A few markers, such as albumin (a protein the liver makes) and INR (a measure of how well blood clots), took longer to return to their pre-surgery levels but generally stayed within the normal range.12 

What Living Liver Donors Should Know 

To donate part of your liver, you usually need to:13 14 

Donation is generally safe, but it’s still major surgery. About 15 to 25 out of 100 donors have complications. The risk of dying is very low. In the USA, about 4 in every 10,000 donors now die within 90 days of surgery. Over the long term, donors’ risk of death is about the same as that of the general population. 

Conclusion 

You can't live without a liver. Without one, your body can survive only a few days, even with help from machines. 

But you can live a full, healthy life with only part of your liver, because it grows back. If your liver fails, a transplant can often save your life. The best thing you can do is protect the liver you have. To keep your liver healthy: 

If you notice any warning signs of liver failure, see a doctor right away. 

Frequently Asked Questions 

Q1: What Color Is Urine When Liver Function Is Impaired? 

Often dark brown, like syrup or brown ale, because bile gets into your urine. Dehydration can also darken pee, so see a doctor if it stays dark after you drink fluids.2 

Q2: What foods are good for your liver, and which ones harm it? 

Fruits, vegetables, and whole grains are good choices, and coffee may help people with fatty liver disease. Limit alcohol, added sugars, fried foods, and packaged snacks with trans fats.15 

Q3: What are the four warning signs of an impending liver failure? 

There’s no official list of four, but these are among the most serious signs: yellow skin or eyes (jaundice), confusion (hepatic encephalopathy), a belly swollen with fluid (ascites), and vomiting blood. If you notice any of them, get medical help right away.2 

Q4: How long do people live with liver failure? 

Acute liver failure can be fatal within days, weeks, or months. Chronic liver failure can last months to years, depending on the cause, the damage, and treatment. A transplant can add many years of life.2 

Q5: What hurts when your liver is damaged? 

Usually, the upper right part of your belly, just under the ribs. But early liver damage often doesn’t hurt at all, so many people don’t know if they have liver disease until it’s advanced.2 

Q6: Can a pig liver replace a human liver? 

Not yet. In a case reported in 2025, a man in China lived 171 days after a pig liver was added alongside his own, though it was removed after 38 days.16 In a 2026 US study, a pig liver connected outside the body supported a brain-dead person for 48 hours.17 The work is still experimental. 

References