Last updated: 01/07/2026
Your liver is one of the most important organs inside your body—and it's also the largest. This reddish-brown, wedge-shaped organ sits just under your ribs against the right side of your stomach and weighs about 3 pounds. But don't let its size fool you; this organ works around the clock, performing hundreds of essential tasks every single day.
Unlike the heart or lungs, the liver is a quiet organ. When it's damaged or diseased, it doesn't cause pain or obvious symptoms until the condition is usually advanced. That's part of the reason why nearly 1 in 4 Americans has some form of liver disease without even knowing it. Understanding what your liver does—and how to protect it—is one of the most important steps you can take for your long-term health.
What Your Liver Does: The Body's Chemical Factory
The liver serves as the body's chemical factory, performing many vital functions—from regulating the levels of chemicals in the body to producing substances that make blood clot during bleeding. As Dr. Marc Ghany, a liver researcher at the National Institutes of Health, explains, "The liver is important for maintaining the health of the overall body because it processes all the nutrients from the food that we eat. And it produces a lot of the proteins that the body needs to stay healthy."
Key Functions at a Glance
1. Nutrient Processing and Metabolism
The liver processes every nutrient that enters your body from the food you eat. It controls the amounts of sugar (glucose), protein, and fat entering your bloodstream. When your blood sugar drops—for example, during sleep or between meals—the liver breaks down stored glycogen and releases glucose into your bloodstream. When there's too much sugar, it removes the excess.
The liver also manufactures about half of the body's cholesterol, which is used to make bile (a fluid that aids in digestion) and certain hormones, including estrogen and testosterone, and is a vital component of every cell membrane.
Related: Why Your Morning Metabolism is Slow: The Hidden Role of Liver Function
2. Detoxification and Waste Removal
One of the liver's most important jobs is detoxification. The liver breaks down harmful or toxic substances absorbed from the intestine or manufactured elsewhere in the body and excretes them as harmless by-products into the bile or blood.
The liver removes bilirubin (a byproduct from the breakdown of red blood cells), ammonia, and other toxins from your blood. It also chemically alters drugs, often making them inactive or easier to excrete from the body. When you take in a potentially toxic substance—like alcohol or medicine—your liver helps alter it and remove it from your body.
3. Protein Production
The liver synthesizes many of the proteins your body needs to function. It produces:
- Clotting factors—proteins needed to stop bleeding
- Albumin—a protein needed to maintain fluid pressure in the bloodstream
- Bile—about 1 liter per day to aid in fat digestion
4. Immunity and Blood Filtration
The liver acts as a filter between blood coming from the gastrointestinal tract and the blood in the rest of the body. Specialized cells in the liver find and destroy bacteria, viruses, and other harmful organisms that enter your body. The liver also clears away old red blood cells.
5. Storage
The liver stores most of the vitamins and minerals your body needs to stay healthy. It also stores energy in the form of glycogen.
The Liver's Remarkable Superpower: Regeneration
The liver is tough and resilient. Unlike most other organs, the liver can regenerate and repair itself after an injury. It's the only solid organ with such a high regenerative capacity.
A liver can regrow to a normal size even after up to 90% of it has been removed. After a partial hepatectomy (surgical removal of two-thirds of the liver), the tissue grows back to essentially 100% of its original size. However, this doesn't mean the liver is invincible. Over time, damage can build up and cause serious problems.
Common Liver Diseases and Conditions
There are many kinds of liver diseases and conditions. Unfortunately, many disorders go undetected for years because they don't cause symptoms early on. About 4.5 million adults in the U.S. have been diagnosed with a liver disease, and many more may have one but don't yet know it.
Steatotic Liver Disease (Fatty Liver Disease)
The most common form of liver disease worldwide is now steatotic liver disease (SLD)—formerly known as fatty liver disease. The pooled global prevalence of SLD is 37.5%. A meta-analysis of 92 studies estimated the worldwide prevalence of MASLD (metabolic dysfunction-associated steatotic liver disease) at 38%, representing a 50% increase over the past 20 years.
MASLD is a liver condition that affects people with excess weight, obesity, or other metabolic conditions such as type 2 diabetes, high blood pressure, or high cholesterol. In MASLD, too much fat builds up in the liver.
MASLD ranges from simple fatty liver (hepatic steatosis) to a more severe form called MASH (metabolic dysfunction-associated steatohepatitis), which causes the liver to swell, leads to fat deposits, and can progress to serious liver scarring (cirrhosis) or even liver cancer. Chronic liver disease affects over 1.5 billion people worldwide and is a leading cause of morbidity and mortality.
Hepatitis
Hepatitis is the name for any condition involving inflammation of the liver. There are five main types of hepatitis viruses—A, B, C, D, and E—which affect hundreds of millions of people worldwide. Hepatitis can be caused by viruses, metabolic conditions like obesity and diabetes, excessive alcohol use, drugs, or toxins. Hepatitis can lead to liver failure, liver cancer, and other life-threatening conditions.
Hepatitis B and C are viral infections that attack the liver. Around 240 million people are chronically infected with hepatitis B and around 150 million people are chronically infected with hepatitis C.
Hepatitis can lead to cirrhosis and liver cancer.
Cirrhosis
Cirrhosis is a hardening of the liver due to scar tissue. Heavy alcohol use and chronic viral hepatitis are common causes. Cirrhosis is considered a pre-cancerous condition that can sometimes lead to liver cancer. The pooled global prevalence of cirrhosis is 1.3%.
Alcohol-Related Liver Disease
Alcohol consumption shows the strongest association with liver-related events. Excessive alcohol use appears to be the strongest factor associated with liver-related events. More than two million people die each year worldwide due to liver disease, with about two-thirds of them men, and most deaths related to complications of cirrhosis and hepatocellular carcinoma.
Risk Factors for Liver Disease
Common risk factors include:
- Obesity (especially weight around the belly)
- Type 2 diabetes and high blood sugar
- High cholesterol
- Heavy alcohol consumption
- Viral hepatitis (hepatitis B and C)
- Certain medications and supplements
- Genetic factors
Warning Signs: When to Pay Attention
Many liver problems don't cause symptoms early on. As Dr. Arun Sanyal, a physician and liver expert at Virginia Commonwealth University, warns, "There may be no noticeable signs of disease until the liver has been severely damaged. And by then, it can be hard to treat."
Early Signs
- Feeling very tired or weak
- Loss of appetite
- Nausea and vomiting
- Mild pain or discomfort over the liver in the upper right side of the abdomen
- Itching of the skin
- Unintentional weight loss
Advanced Signs
- Jaundice—yellowing of the skin and whites of the eyes
- Abdominal pain and swelling (ascites)
- Swelling in the legs and ankles
- Dark urine
- Itchy skin
- Confusion or difficulty concentrating
Key takeaway: Even if you're not having symptoms, talk to your primary care doctor and ask about the health of your liver. If problems are caught early, you can take steps to protect your liver's health.
How to Keep Your Liver Healthy
The good news is that most liver diseases are preventable. Scientific evidence supports that almost 90% of all major liver diseases are either preventable or manageable with lifestyle changes.
1. Eat a Liver-Friendly Diet
A well-balanced diet can have a big impact on liver health. The Mediterranean diet is particularly recommended—it's rich in vegetables, fish, olive oil, nuts, and whole grains.
Foods to prioritize:
- Fresh fruits and vegetables—rich in fiber, vitamins, and antioxidants that reduce inflammation and support liver health
- Whole grains—oats, brown rice, quinoa, and whole-wheat bread
- Lean proteins—skinless chicken, fish (especially fatty fish like salmon for omega-3s), eggs, beans, lentils, and tofu
- Healthy fats—olive oil, avocado, nuts, and seeds
- Coffee—moderate consumption (2-3 cups daily) may protect the liver by reducing fat build-up
- Green tea—rich in catechins that may help improve liver function
- Milk thistle: through its active compound silymarin, is traditionally used to support liver function and protect liver cells.
- Dandelion root: has a long history of use as a liver tonic to support detoxification and bile production; together, they are often combined in liver health supplements, though scientific evidence for their efficacy remains mixed.
Foods to limit or avoid:
- Sugary foods and drinks—cakes, biscuits, sweets, and sugary drinks; fructose can increase liver fat
- Refined carbohydrates—white bread, pastries, white pasta, and many breakfast cereals
- Saturated and trans fats—fatty cuts of meat, butter, full-fat cheese, and processed snacks
- Alcohol—the liver can only process small amounts
Weight loss of 5-10% of body weight can significantly improve MASLD. Even without weight loss, the Mediterranean diet is a powerful tool against liver disease.
2. Exercise Regularly
Physical activity is another cornerstone of liver health. Aerobic exercise such as brisk walking, swimming, or cycling can reduce hepatic triglyceride content, enhance mitochondrial function, and improve insulin sensitivity.
Aim for at least 150 minutes of moderate exercise each week. Resistance training in addition to aerobic exercise should also be considered, especially for those losing body mass.
3. Limit Alcohol Consumption
Alcohol is one of the greatest threats to liver health. All types of alcohol increase the risk of liver disease. The CDC notes that your liver can only process small amounts of alcohol.
A healthy lifestyle score combining multiple factors—not smoking, no or low alcohol intake, regular physical activity, short sedentary time, healthy diet, healthy sleep, and healthy weight—is associated with a significantly lower risk of liver disease.
4. Get Vaccinated
Hepatitis A and B are viral diseases of the liver. Both can be prevented with vaccines. The World Health Organization recommends that every country include the hepatitis B vaccine in its national immunization program.
5. Be Careful with Medications and Supplements
Be careful about the medicines you're taking, including over-the-counter products such as pain relievers. Some supplements marketed for liver health can actually be harmful. As Dr. David Victor, a liver specialist at Houston Methodist, warns, "Your liver is the detox organ of the body. Often, supplements that are taken with the best of intentions can actually damage your liver."
6. Practice Prevention
- Wash your hands often, especially after using the bathroom, touching pets, and before eating
- Don't share needles, razors, toothbrushes, or other personal items
- Practice safe sex to reduce the risk of contracting hepatitis
- Limit your exposure to toxins, such as cleaning supplies, chemicals, and tobacco products
- Don't smoke, vape, or use other tobacco products
- If you have diabetes, keep your blood sugar in a normal range
7. Get Regular Check-Ups
A simple blood test (liver function tests) checks the levels of certain enzymes and proteins in your blood. Levels that are higher or lower than usual can indicate liver problems. A Fibrosis-4 score—a calculation that includes your platelet count, age, and levels of certain enzymes—can estimate your risk for advanced liver scarring.
If you have risk factors like obesity, diabetes, or high cholesterol, ask your doctor about routine liver checks.
The Bottom Line: The Liver Detox Myth
Walk down any pharmacy aisle or browse online and you'll see products promising to "cleanse" or "detox" your liver. These claims sound tempting, but experts largely advise against them.
There is no scientific evidence that special cleanses or detox diets actually cleanse the liver or improve its function. As one specialist bluntly states: "There's no such thing as a liver cleanse. It doesn't exist, and if you take them, there's a good chance that what you're doing is unhealthy or dangerous."
Your liver is already perfectly capable of cleansing itself. The best way to support it is not through expensive supplements or restrictive cleanses but through consistent, healthy daily habits: a balanced diet, regular exercise, limited alcohol, and avoiding harmful substances.
Key Takeaways
The liver is a resilient, hardworking organ that keeps your entire body functioning properly. It processes your food, cleanses your blood, stores your energy, and fights off infections—all while having the remarkable ability to regenerate itself. But it's not invincible. By making smart daily choices, you can protect your liver and, in turn, protect your overall health for years to come.
FAQ: Liver Health and Natural Supplements
1. Why is liver health important for overall well-being?
The liver is essential for numerous bodily functions, including detoxification, digestion, metabolism, and immune support. It helps filter toxins, produce bile for digestion, regulate blood sugar, and store vital nutrients. Maintaining a healthy liver is crucial for optimal bodily function.
2. Can supplements support liver health?
Yes, certain supplements can promote liver health by reducing inflammation, oxidative stress, and liver fat accumulation. Some popular supplements include milk thistle (silymarin), omega-3 fatty acids, vitamin E, and N-acetylcysteine (NAC), all of which may help protect the liver from damage and support its detoxification functions.
3. What is the best supplement for liver detoxification?
Milk thistle, with its active ingredient silymarin, is one of the most studied and popular supplements for liver detoxification. It may help protect liver cells from toxins, reduce inflammation, and promote liver regeneration. Other supplements like turmeric and NAC also support detoxification by enhancing the liver’s ability to eliminate harmful substances.
4. Are there any natural remedies to improve liver health?
Yes, several natural remedies have been traditionally used to support liver health, including:
4.1. Milk Thistle (Silybum marianum)
- Contains silymarin, a powerful antioxidant that protects liver cells from damage.May help regenerate liver tissue and reduce inflammation (Federico et al., 2017).
4.2. Dandelion Root (Taraxacum officinale)
- Stimulates bile production, aiding in digestion and toxin elimination. Has diuretic properties that help flush out toxins through urine (Schütz et al., 2006).
4.3. Turmeric (Curcuma longa)
- Contains curcumin, which has strong anti-inflammatory and antioxidant effects. Helps enhance liver enzyme activity and supports detoxification (Farzaei et al., 2018).
4.4. Artichoke Leaf (Cynara scolymus)
- Boosts bile production, supporting fat digestion and toxin elimination. May protect the liver from damage and improve liver function (Joyce & O’Sullivan, 2018).
4.5. Burdock Root (Arctium lappa)
- Acts as a blood purifier and supports liver detoxification. Has antioxidants that help neutralize harmful substances (Predes et al., 2011).
4.6. Schisandra (Schisandra chinensis)
- An adaptogenic herb that helps the liver process toxins efficiently. Supports liver enzyme production and reduces oxidative stress (Panossian & Wikman, 2008).
4.7. Licorice Root (Glycyrrhiza glabra)
- Contains glycyrrhizin, which may protect liver cells and reduce inflammation. Has been studied for its potential benefits in liver disorders (Yang et al., 2017).
4.8. Peppermint (Mentha piperita)
- Aids digestion and helps the liver break down fats.
- Has bile-stimulating properties that support detoxification (McKay & Blumberg, 2006).
5. How much milk thistle should I take for liver support?
The recommended dosage for milk thistle extract is typically 200 to 400 milligrams, taken three times daily. However, it's best to follow the instructions on the product label or consult a healthcare provider before starting any supplement regimen.
6. Can I reverse liver damage with supplements?
While supplements can support liver health, they are not a cure for serious liver conditions such as cirrhosis or liver cancer. Early detection and medical treatment are crucial for managing liver disease. Supplements like milk thistle and NAC may help protect the liver from further damage, but they should be used as part of a broader health strategy.
7. What lifestyle changes can improve liver health?
To support liver health, consider the following lifestyle changes:
- Eat a balanced diet rich in fruits, vegetables, and whole grains.
- Limit alcohol consumption to prevent liver damage.
- Exercise regularly to maintain a healthy weight and reduce the risk of fatty liver disease.
- Stay hydrated to support liver function and detoxification.
- Avoid smoking and minimize exposure to environmental toxins.
8. Are there any side effects from using liver supplements?
Most liver supplements, when used in recommended doses, are generally safe. However, side effects can occur, such as digestive issues, allergic reactions, or interactions with medications. Always consult with a healthcare professional before starting any new supplement, especially if you have pre-existing health conditions or are on medication.
9. What foods should I avoid for better liver health?
Avoid or limit foods that can strain the liver, such as:
- Excessive alcohol
- High-fat and processed foods, which can contribute to fatty liver disease.
- Sugary beverages and foods, as excessive sugar can lead to insulin resistance and liver fat accumulation.
10. Can I take supplements for liver health while on medication?
Before starting any new supplements, it's important to speak with your healthcare provider. Some liver supplements, such as milk thistle, may interact with medications or affect their efficacy, especially drugs for blood thinning, diabetes, or chemotherapy. Your doctor can help ensure safe use.
The liver plays an indispensable role in maintaining overall health, from detoxifying the body to supporting metabolism, immune function, and hormone regulation. By adopting a healthy lifestyle, including a balanced diet, regular exercise, and limiting exposure to toxins, you can help support liver health and ensure that this vital organ continues to function optimally. Additionally, incorporating liver-supporting herbs like milk thistle and turmeric can provide an extra layer of protection for your liver. Remember, liver health is a key component of overall wellness, so make it a priority in your health routine.