Key points
- The newer name is MASLD (metabolic dysfunction-associated steatotic liver disease), which replaced NAFLD; its inflammatory form, MASH, replaced NASH.
- Ultrasound "grade 1, 2 or 3" describes fat, not damage. Scarring (fibrosis) is judged with blood scores and a FibroScan.
- Losing 7–10% of body weight can reduce liver fat, calm inflammation and in some people reverse early scarring.
- Indians can develop fatty liver at a lower weight than Western populations — the thin-fat body type with fat around the waist.
- Fatty liver is one of the commonest reasons a willing family member cannot be a living liver donor.
MASLD, NAFLD, MASH, NASH — what the names mean
In 2023 international liver societies renamed non-alcoholic fatty liver disease (NAFLD) as metabolic dysfunction-associated steatotic liver disease (MASLD). The new name describes the cause — metabolic problems such as diabetes, excess weight, high blood pressure and abnormal cholesterol — rather than simply the absence of alcohol. Many reports and doctors still use the older terms, and they refer to essentially the same people.
- Steatosis (simple fatty liver): extra fat in liver cells with little inflammation. Common and usually slow.
- MASH (previously NASH): fat plus inflammation and liver-cell injury. This is the form that can lead to scarring.
- Fibrosis and cirrhosis: scarring that builds up over years in some people with MASH. Advanced fibrosis and cirrhosis are what determine long-term risk.
- MetALD: metabolic fatty liver in someone who also drinks a moderate amount of alcohol — the two injuries add together.
Ultrasound grade vs FibroScan: reading your report
| Test | What it measures | What it cannot tell you |
|---|---|---|
| Ultrasound (grade 1, 2, 3) | How bright the liver looks, which roughly reflects the amount of fat | Whether there is inflammation or scarring. A grade 3 fatty liver may have no scarring; a scarred liver may show little fat |
| Liver blood tests (SGPT/ALT, SGOT/AST) | Ongoing liver-cell injury | Normal values do not exclude MASH or fibrosis |
| FIB-4 score | A simple calculation from age, AST, ALT and platelets to estimate the likelihood of advanced fibrosis | An intermediate or high result needs further testing |
| FibroScan (transient elastography) | Liver stiffness in kPa (a marker of scarring) and CAP (a marker of fat) | Readings can be falsely high after food, with active inflammation or heart failure; ideally done fasting |
A common and sensible approach is to calculate FIB-4 from routine blood tests and, if it is not clearly low, arrange a FibroScan. A low stiffness reading is reassuring; a high one needs review by a hepatologist, and occasionally a liver biopsy or MR elastography.
Who is at risk
- Type 2 diabetes — the strongest single risk factor for fatty liver progressing to fibrosis and cirrhosis.
- Excess weight, particularly around the waist. In Indians, health risks rise from a BMI of about 23, lower than the Western cut-off of 25.
- The thin-fat Indian phenotype — people of normal weight who carry fat around the abdomen and have low muscle mass. They can develop MASLD without looking overweight.
- High blood pressure, high triglycerides or low HDL cholesterol, and polycystic ovary syndrome.
- A family history of diabetes or fatty liver, sleep apnoea and an underactive thyroid.
Treatment: weight, food, movement — and when medicines help
There is no tablet that dissolves fat from the liver on its own. The foundation of fatty liver treatment is steady weight loss and better metabolic health, and the evidence for this is strong.
Weight-loss targets
Losing about 5% of body weight reduces liver fat; 7–10% can resolve inflammation; around 10% or more gives the highest chance of improving fibrosis. Aim for gradual loss of about half to one kilogram a week.
Food
Cut sugary drinks, sweets, fruit juices and refined carbohydrates (white rice, maida, biscuits). Favour vegetables, dal, pulses, fish, whole grains and nuts. Reduce fried snacks and packaged foods.
Movement
About 150–300 minutes of moderate activity a week, such as brisk walking, plus strength exercises twice a week to build muscle. Activity helps even before the weight falls.
Alcohol
Anyone with fatty liver, and certainly anyone with fibrosis, is advised to avoid alcohol — the effects of alcohol and metabolic fat on the liver add up.
Controlling diabetes, blood pressure and cholesterol protects both the liver and the heart — and heart disease, not liver disease, is the commonest cause of death in people with MASLD. For people with MASH and significant fibrosis, a hepatologist may add medicines; several have been approved in different countries for selected patients, and some diabetes and weight-loss medicines also benefit the liver. Bariatric surgery is an option for some people with severe obesity. Avoid "liver detox" products and unregulated herbal remedies, which can themselves injure the liver.
When fatty liver becomes cirrhosis or cancer
Most people with fatty liver never develop cirrhosis. The risk lies mainly with those who already have significant fibrosis, and it is higher with diabetes, older age and continued weight gain. Progression is usually slow — over years to decades — and silent, which is why a FibroScan matters even when you feel well.
Once cirrhosis develops, the risk of liver cancer rises and six-monthly ultrasound surveillance is needed. Liver cancer can occasionally develop in MASH even before full cirrhosis. MASLD-related cirrhosis is an increasingly common reason for liver transplant worldwide, and patients with diabetes, heart disease and obesity need careful assessment before surgery. Liver cancers found early may be suitable for liver cancer surgery.
See a doctor promptly if you have fatty liver and:
yellow eyes, swelling of the abdomen or legs, vomiting blood or black stools, confusion, a low platelet count, or a FibroScan reading suggesting advanced scarring. These suggest the disease has moved beyond simple fat.
Fatty liver and living liver donation
In living donor liver transplant, a healthy relative donates part of their liver. A donor liver with significant fat does not regenerate or function as reliably, and a fatty liver makes the operation riskier for the donor. Fatty liver is therefore one of the commonest reasons potential donors in India are declined.
This is not always final. When the fat is mild to moderate and the donor is otherwise healthy, supervised diet and exercise over several weeks can reduce liver fat enough for the donor to be reassessed with repeat imaging. The transplant team — never the family alone — decides whether this is safe and whether time allows. See who can be a liver donor and liver donor surgery. Dr Bappaditya Har and the transplant team at Narayana RN Tagore Hospital, Kolkata, assess donors individually; reports can be shared on WhatsApp (+91 70420 39420).
Frequently asked questions
Is grade 1 fatty liver dangerous?
Grade 1 on ultrasound means a mild amount of fat. On its own it is usually not dangerous, but it is a signal to check blood sugar, cholesterol and a fibrosis score, and to work on weight and activity.
Can fatty liver be reversed?
Yes. Fat in the liver, and early inflammation and scarring, can improve substantially with weight loss of 7–10%, regular exercise and avoiding alcohol. Established cirrhosis is much harder to reverse.
I am thin. Why do I have fatty liver?
Many Indians have fat stored around the abdomen and in the liver despite a normal weight, often with low muscle mass, diabetes risk or a family history. Lean fatty liver can progress too and should be assessed the same way.
Which is the right diet for fatty liver?
There is no special liver diet. Reduce sugar, sweets, refined flour, white rice portions and fried food; eat more vegetables, pulses, fish and whole grains; and control portion size. Consistency matters more than any single food.
Do I need a FibroScan?
If your FIB-4 score is not clearly low, if you have diabetes, or if your liver enzymes stay high, a FibroScan helps decide whether there is significant scarring and how closely you need to be followed.
Can a person with fatty liver donate part of their liver?
Significant fatty liver usually rules a person out, at least initially. Some donors with mild to moderate fat can reduce it through supervised weight loss and be reassessed. The transplant team decides.
Related reading
Liver Cirrhosis Treatment in Kolkata: Stages, Care and When to Consider a Transplant →
Cirrhosis explained: compensated vs decompensated, Child-Pugh and MELD in plain words, what treatment can and cannot do, and when to consider a transplant.
Who Can Be a Liver Donor? Eligibility, Tests and the Legal Process in India →
Living liver donor eligibility in India — age, blood group, BMI, fatty liver, liver size — the donor tests, THOTA approval and the right to withdraw.
Liver Specialist in Kolkata: Hepatologist, Gastroenterologist or Liver Surgeon? →
Hepatologist, gastroenterologist or liver transplant surgeon? Which liver doctor in Kolkata to see for fatty liver, hepatitis, cirrhosis or a tumour.
Signs and Symptoms of Liver Disease →
Liver disease is often silent until late. Learn the early and late warning signs, which symptoms are urgent, the simple tests, and who should get checked.
Liver Cancer Surgery →
Surgery and transplant for hepatocellular carcinoma and liver tumours.
This page is general patient information, not a diagnosis or a substitute for a consultation. Treatment decisions depend on each patient's reports and examination. Read our medical disclaimer and editorial policy.