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SGPT (ALT) normal range: what your liver test result means

SGPT, also called ALT (alanine aminotransferase), is an enzyme found mainly inside liver cells. When liver cells are irritated or damaged, more of it leaks into the blood and the SGPT number on your report goes up. It is one of the most checked values in a liver function test (LFT). People often get it tested because of fatty liver on ultrasound, alcohol use, diabetes, long-term medicines, tiredness or simply as part of a routine health check. A mildly high value is common; your doctor reads it together with your other results.

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SGPT (ALT) – Normal range chart

LevelValue (U/L)
Normal (adults)Many labs use an upper limit of about 40 – 45About 7 – 56 U/L
Mildly raisedCommon; often fatty liver, alcohol or medicinesAbove the upper limit, up to about 3 times it
Moderately raisedShow a doctor soonAbout 3 – 10 times the upper limit
Very highNeeds prompt medical attentionMore than about 10 times the upper limit

Ranges differ a little from lab to lab.

What does my result mean?

SGPT (ALT) SGPT 60 U/L

This is slightly above the usual range. It is often seen with fatty liver, weight gain, alcohol or some medicines; your doctor may repeat the test and look at other liver values.

SGPT (ALT) SGPT 100 U/L

This is a moderate rise, about 2 to 3 times the upper limit many labs use. Show it to your doctor, who may advise more tests such as an ultrasound or hepatitis tests.

SGPT (ALT) SGPT 200 U/L

This is clearly high and should be shown to a doctor soon. Possible reasons include viral hepatitis, medicine side effects or other liver problems, which only proper checking can sort out.

What this test checks

The test measures the amount of ALT enzyme in your blood, reported in units per litre (U/L). It is usually done as part of a liver function test along with SGOT, bilirubin and other values. Doctors often suggest it for people with diabetes, obesity, fatty liver, regular alcohol intake, risk of hepatitis or long-term medicines. Healthy adults usually check it once a year in a routine checkup; people with liver problems may need it more often, as the doctor advises.

Common reasons for a high value

  • Fatty liver, often linked with weight gain or diabetes
  • Regular or heavy alcohol intake
  • Some medicines, including some painkillers, TB medicines and herbal products
  • Viral hepatitis (such as hepatitis A, B, C or E)
  • Very heavy exercise or muscle injury in the past few days
  • Less common: thyroid problems or other liver and muscle conditions

How to prepare

No special preparation is needed for SGPT alone. If it is part of a liver function test, many labs suggest 8–10 hours of fasting (plain water is fine). Avoid alcohol and very heavy exercise for 24–48 hours before the test, and keep taking your usual medicines unless your doctor says otherwise.

When to see a doctor

Show your report to a doctor if SGPT is above the range printed on it, especially if it stays high on a repeat test. See a doctor quickly if you also have yellow eyes or skin, dark urine, pale stools, repeated vomiting or pain in the upper right side of the belly. Yellow eyes with confusion, extreme sleepiness or vomiting blood is an emergency – go to a hospital immediately.

SGPT (ALT) – FAQs

What is the normal SGPT level?

In adults, SGPT is usually about 7–56 U/L, though many Indian labs use an upper limit of about 40–45 U/L. The range printed on your own report is the one that applies, and your doctor reads it with your other results.

Is high SGPT always serious?

No. Mild rises are very common and are often linked with fatty liver, weight, alcohol or medicines. The value can also change from one test to the next. Your doctor decides whether a repeat test or further checks are needed.

What is the difference between SGPT and SGOT?

Both are enzymes checked in a liver function test. SGPT is found mainly in the liver, while SGOT is also found in the heart and muscles. Doctors look at both together, along with bilirubin, to understand liver health.

How is the SGPT test done at home?

A trained person collects a small blood sample at your home, usually as part of a liver function test. It is tested at a Thyrocare partner lab and the report is sent to you on WhatsApp and email.

This page is general information, not medical advice. The normal range printed on your own report is the one that applies, and only a doctor can tell what your result means for you.

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75 tests included · Report in 24–48 hours
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SENIOR CITIZEN PROFILE FEMALE package details

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SENIOR CITIZEN PROFILE MALE package details

SENIOR CITIZEN PROFILE MALE

129 tests included · Report in 24 Hours
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  • CANCER MARKER ( 2 TEST)
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AAROGYAM A PRO - PACKAGE package details

AAROGYAM A PRO - PACKAGE

12 tests included · Report in 24–48 hours
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