Also seen on reports as: ALT, AST, SGPT (older name for ALT), SGOT (older name for AST), Transaminases
What is SGPT / SGOT?
SGPT and SGOT are two enzymes that sit inside liver cells. When liver cells are stressed or damaged, the cells leak these enzymes into the bloodstream — so a higher blood level usually means liver cells are under stress.
SGPT (Serum Glutamic-Pyruvic Transaminase) is now more commonly called ALT (Alanine Aminotransferase). SGOT (Serum Glutamic-Oxaloacetic Transaminase) is now more commonly called AST (Aspartate Aminotransferase). Most Indian lab reports use both names — 'SGPT (ALT)' and 'SGOT (AST)'.
ALT is more specific to the liver — most ALT in the body sits in liver cells. AST is also found in muscle, heart, and red blood cells, so AST can rise from non-liver causes too. The test is run on a small blood sample drawn from a vein. NABL-accredited Indian labs report both values in units per litre (U/L).
Why doctors order it
SGPT and SGOT are part of the standard Liver Function Test (LFT) panel ordered as part of routine health checks, when symptoms suggest liver involvement (loss of appetite, persistent nausea, dark urine, yellowing of eyes or skin, right-upper-abdomen pain, easy bruising), before starting certain medications, and as part of pre-operative work-up.
In Indian practice, a common reason for raised SGPT is non-alcoholic fatty liver disease (NAFLD), which has become very common in urban Indian adults — affecting an estimated 25–30% of the population and rising. Doctors also commonly order LFTs to investigate viral hepatitis (A, B, C, E), alcohol-related liver injury, tuberculosis medication toxicity, and possible drug or herbal supplement injury.
LFTs are routinely monitored in pregnancy, in people taking long-term medications known to affect the liver (TB medicines, anti-seizure drugs, methotrexate, statins in some situations), and in people undergoing chemotherapy.
What the result means
Mild elevations (up to 2–3 times the upper limit of normal) are common and have many causes — most often NAFLD, viral hepatitis, recent alcohol use, certain medications, or recent unaccustomed intense exercise. Moderate elevations (3–10 times normal) usually point to active hepatitis (viral, drug-induced, or autoimmune) or significant injury. Very high elevations (more than 10 times normal) often reflect acute hepatocellular injury and need urgent evaluation.
The ratio between SGOT and SGPT can give clues to the cause. A ratio greater than 2:1 (SGOT higher) is classically seen in alcohol-related liver disease and in advanced cirrhosis. A ratio close to 1:1 with both raised is common in NAFLD and viral hepatitis. These are general patterns — the doctor reads them in clinical context.
A single mildly raised reading on a routine check is rarely an emergency. Doctors typically repeat the test, look at the rest of the LFT panel (ALP, GGT, bilirubin, albumin), ask about alcohol and medications including ayurvedic/herbal supplements, and may add hepatitis B/C screening and an abdominal ultrasound depending on the picture.
Reference range
Values in U/L (units per litre). Reference ranges vary slightly between Indian labs.
- SGPT (ALT) — typical adult range
- Roughly 7 – 56 U/L (men slightly higher than women)
- SGOT (AST) — typical adult range
- Roughly 10 – 40 U/L
- Mild elevation
- Up to ~2–3× the upper limit — common, many causes
- Moderate elevation
- ~3–10× the upper limit — usually warrants investigation
- Marked elevation
- More than 10× the upper limit — typically active hepatitis or significant injury, urgent evaluation
Indian liver societies have flagged that conventional ALT cut-offs may be too lenient — some hepatologists treat ALT >30 U/L in men and >19 U/L in women as worth investigating, especially with NAFLD risk factors (central obesity, diabetes, dyslipidaemia).
In India
What this test means for an Indian reader
Non-alcoholic fatty liver disease (NAFLD) has become extremely common in urban Indian adults — prevalence estimates of 25–30% and rising — and is often the first cause of mildly raised SGPT/SGOT. Other common causes seen in Indian practice include hepatitis B/C, tuberculosis-medication hepatotoxicity, and herbal/ayurvedic supplement-induced liver injury.
Indian liver societies have flagged that the conventional 'upper limit of normal' for ALT (~40 U/L) may be too lenient; some hepatologists treat ALT >30 U/L in men and >19 U/L in women as worth investigating, especially if NAFLD risk factors are present.
Indian guidelines & references
- Indian National Association for Study of the Liver (INASL)
- Indian Society of Gastroenterology (ISG)
- ICMR National Viral Hepatitis Control Programme
Common factors that affect the result
Many everyday factors can mildly raise SGPT/SGOT — recent unaccustomed intense exercise (gym sessions, marathons), recent fasting or rapid weight loss, alcohol intake in the days before the test, common medications (paracetamol at higher doses, statins, some antibiotics, anti-fungals), tuberculosis medications, and supplements including iron, vitamin A in high doses, and many ayurvedic/herbal preparations.
AST in particular is also released from muscle and red blood cells, so muscle injury (intramuscular injections, intense exercise, crush injuries) and red-cell turnover (haemolysis) can raise AST without any liver involvement. This is why doctors look at AST and ALT together rather than in isolation.
NAFLD is the most common single cause of mildly raised SGPT in urban Indian adults today. NAFLD often runs alongside obesity, type-2 diabetes, dyslipidaemia, and metabolic syndrome — sometimes called the 'liver face' of insulin resistance. Improvement in those underlying conditions usually improves SGPT over months.
When to talk to your doctor
- Your SGPT or SGOT is more than 2–3 times the upper limit of normal, or has risen sharply from previous readings.
- You have symptoms suggesting active liver involvement — yellowing of eyes or skin, dark urine, pale stools, persistent right-upper-abdomen pain, severe loss of appetite, or unexplained nausea and vomiting.
- You are on tuberculosis medication, anti-seizure medication, methotrexate, or are receiving chemotherapy, and your liver enzymes have moved out of range.
- You take regular ayurvedic, herbal, or unregulated supplements and have raised liver enzymes — many such preparations have been documented to cause liver injury.
- You have known fatty liver and your enzymes are not improving with lifestyle measures, or you have central obesity / diabetes / high triglycerides alongside raised SGPT.
Related tests
Sources
- INASL Position Statements on Liver Function Test Interpretation — Indian National Association for Study of the Liver
- ISG Clinical Practice Guidelines — Indian Society of Gastroenterology
- ICMR National Viral Hepatitis Control Programme — Indian Council of Medical Research
- AASLD Guidelines on Abnormal Liver Tests — American Association for the Study of Liver Diseases
- WHO Guidelines on Hepatitis Testing — World Health Organization
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