Key points
- An LFT is a group of blood tests. SGPT (ALT) and SGOT (AST) reflect liver cell injury; bilirubin, ALP and GGT reflect bile flow; albumin and INR reflect how well the liver works.
- Normal ranges differ between labs. Many Indian labs use SGPT upper limits of about 40 to 45 U/L, but healthy upper limits are lower, especially in women.
- In India, fatty liver, viral hepatitis, alcohol and medicines (including herbal products) are the common causes of a raised SGPT.
- Normal LFTs do not rule out fatty liver or scarring. Very high values, jaundice or a low albumin need prompt attention.
Liver function tests are part of almost every health check-up package in India, so many people end up with a report that shows a slightly high SGPT and no explanation. Most mildly raised results have a common, manageable cause. A few need attention quickly. Knowing which is which makes the next conversation with your doctor much easier.
What a liver function test measures
Despite the name, most of the tests in an LFT do not measure how well the liver is working. They show whether liver cells are being injured, whether bile is flowing normally, and only a couple measure liver function directly. Doctors read them together, alongside your history and other tests.
Each test explained
| Test (other names) | What it shows |
|---|---|
| SGPT (ALT, alanine aminotransferase) | An enzyme found mainly in liver cells. Rises when liver cells are damaged; the most liver-specific of the enzymes |
| SGOT (AST, aspartate aminotransferase) | An enzyme in the liver, heart and muscles. Rises with liver injury, but also after heavy exercise or muscle injury |
| ALP (alkaline phosphatase) | Found in the bile ducts and bone. Rises with blocked bile flow, bone conditions, in pregnancy and in growing teenagers |
| GGT (gamma-glutamyl transferase) | Helps tell whether a high ALP is from the liver. Also rises with alcohol and some medicines |
| Bilirubin (total, direct, indirect) | A yellow pigment from old red blood cells, cleared by the liver. High levels cause jaundice |
| Albumin and total protein | Proteins made by the liver. Low albumin can mean long-standing liver disease, but also poor nutrition or kidney loss |
| PT/INR (often a separate test) | How quickly blood clots; the liver makes clotting proteins. A raised INR can mean the liver is not working well |
SGPT, SGOT and LFT normal ranges
Always read your result against the reference range printed on your own report, because ranges vary between labs and methods. As a general guide for adults:
| Test | Typical reference range on Indian reports |
|---|---|
| SGPT (ALT) | Up to about 40 to 45 U/L |
| SGOT (AST) | Up to about 40 U/L |
| ALP | About 40 to 130 U/L in adults |
| GGT | Up to about 40 to 60 U/L (lower in women) |
| Total bilirubin | Up to about 1.0 to 1.2 mg/dL |
| Albumin | About 3.5 to 5.0 g/dL |
The American College of Gastroenterology guideline points out that truly healthy SGPT levels are lower than many lab limits: roughly 29 to 33 U/L for men and 19 to 25 U/L for women. So a value of 38 in a woman may be “within range” on the report but still worth noting if other risk factors are present.
What a high SGPT or SGOT means
A raised SGPT or SGOT means liver cells are under some stress, but the number alone does not say why, or how serious it is. Doctors look at how high it is and how long it lasts:
- Mildly raised (up to about five times the upper limit): common, usually from fatty liver, alcohol or medicines. Your doctor will usually repeat the test and look for a cause.
- Moderately or very high (many times the limit, sometimes in the hundreds or thousands): points to acute injury, such as viral hepatitis, a medicine or supplement reaction, or reduced blood flow to the liver. This needs prompt medical review.
- Persistently raised for six months or more: needs a full work-up for chronic liver disease.
Common causes of raised liver enzymes in India
- Fatty liver (MASLD): the most common cause. See our fatty liver disease guide.
- Viral hepatitis: hepatitis A and E (spread through contaminated food and water, especially in the monsoon) cause sudden illness with jaundice; hepatitis B and C can cause long-term liver disease, often without symptoms.
- Alcohol.
- Medicines: TB medicines, some antibiotics, painkillers such as high doses of paracetamol, anti-epileptics and others.
- Herbal and dietary supplements: Indian liver specialists have reported liver injury linked to some ayurvedic, herbal and bodybuilding products. Tell your doctor about everything you take.
- Muscle injury or heavy exercise (raises SGOT more than SGPT).
- Less common: thyroid problems, coeliac disease, autoimmune hepatitis, Wilson's disease and others.
Patterns doctors look for
- SGPT higher than SGOT: common in fatty liver and viral hepatitis.
- SGOT about twice SGPT or more: raises the possibility of alcohol-related liver disease or advanced scarring.
- High ALP and GGT, with or without bilirubin: suggests a problem with bile flow, such as gallstones in the bile duct.
- Only bilirubin mildly raised, mostly indirect, other tests normal: often Gilbert's syndrome, a common, harmless inherited condition. It can flare with fasting or illness.
- Low albumin and raised INR: can mean the liver is not working well, as in cirrhosis. See our guide to fibrosis and cirrhosis.
Your SGOT, SGPT and platelet count, together with your age, are also used to calculate the FIB-4 score, which estimates liver scarring. It is the recommended first check for anyone with fatty liver; our guide to fatty liver grades on ultrasound explains it.
What can affect results
- Strenuous exercise in the day or two before the test (raises SGOT).
- Recent alcohol.
- New medicines or supplements.
- Fasting for a long time (can raise bilirubin in Gilbert's syndrome).
- Pregnancy (raises ALP).
Normal LFTs do not rule out liver disease. Many people with fatty liver, and some with cirrhosis, have normal enzyme levels.
When to see a doctor
- SGPT or SGOT more than about five times the upper limit, or rising on repeat tests.
- Raised enzymes that last more than a few months.
- Yellow eyes or skin, dark urine or pale stools.
- Raised enzymes after starting a new medicine or supplement: tell your doctor before the next dose.
- Confusion, drowsiness, vomiting blood, black stools or bleeding easily: call 112.
Questions to ask your doctor
- Which of my results are outside the range, and by how much?
- Should I be tested for hepatitis B and C?
- Could any of my medicines or supplements be the cause?
- What is my FIB-4 score?
- When should I repeat the tests?
Frequently asked questions
What is the normal range of SGPT?
Many Indian labs report SGPT up to about 40 to 45 U/L as normal. Healthy upper limits are lower, roughly 29 to 33 U/L in men and 19 to 25 U/L in women. Always read your result against the range on your own report.
Is SGPT of 60 dangerous?
An SGPT of 60 is mildly raised. It is common and usually caused by fatty liver, alcohol or medicines. It is not an emergency, but your doctor should repeat the test and look for the cause.
Do I need to fast for a liver function test?
Many labs suggest fasting for 8 to 12 hours, especially when other tests such as sugar or cholesterol are done at the same time. Follow your lab's instructions.
What is the difference between SGOT and SGPT?
Both are enzymes released when liver cells are injured. SGPT (ALT) is found mainly in the liver, so it is more specific. SGOT (AST) is also in heart and muscle, so it can rise after exercise or muscle injury.
Can liver function tests be normal with fatty liver?
Yes. Many people with fatty liver, and some with scarring, have normal liver enzymes. That is why a FIB-4 score and sometimes a FibroScan are used to check for scarring.
Sources
- Kwo PY, Cohen SM, Lim JK. ACG Clinical Guideline: Evaluation of Abnormal Liver Chemistries. Am J Gastroenterol 2017;112(1):18–35.
- Rinella ME, et al. AASLD Practice Guidance on the clinical assessment and management of nonalcoholic fatty liver disease. Hepatology 2023;77(5):1797–1835.
- European Association for the Study of the Liver, et al. EASL-EASD-EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD). J Hepatol 2024;81(3):492–542.
This article is general information for adults in India and is not a diagnosis or a treatment plan. Always discuss results and any changes with your own doctor. Read our editorial policy.