What is SGPT / ALT?
SGPT stands for Serum Glutamic Pyruvic Transaminase. Its modern name is ALT (Alanine Aminotransferase). It is an enzyme found mainly in liver cells. When liver cells are damaged or inflamed, they release SGPT into the bloodstream — causing blood levels to rise. SGPT is the most liver-specific enzyme: a raised SGPT almost always means the liver is involved.
SGPT Normal Range
| Group | Normal Range (U/L) |
|---|---|
| Men | 7 – 56 U/L |
| Women | 7 – 45 U/L |
| Children | 7 – 45 U/L |
| Mild elevation | 1–3× upper limit |
| Moderate elevation | 3–10× upper limit |
| Severe elevation | >10× upper limit |
What does HIGH SGPT mean?
HIGH SGPT mildly elevated (1–3× normal)
Mild elevation is extremely common and often caused by: fatty liver disease (NAFLD — the most common cause in India), alcohol consumption, obesity, Type 2 diabetes, certain medications (statins, paracetamol, antibiotics), vigorous exercise before the test, or thyroid disease. A single mildly elevated SGPT without symptoms usually warrants a repeat test in 4–6 weeks before any action.
HIGH SGPT moderately elevated (3–10× normal)
Moderate elevation suggests more significant liver injury. Causes include: acute viral hepatitis (Hepatitis A, B, E — very common in India), alcoholic hepatitis, drug-induced liver injury (DILI), or autoimmune hepatitis. Requires further investigation: Hepatitis B surface antigen, Hepatitis C antibody, ultrasound abdomen.
HIGH SGPT severely elevated (>10× normal)
Severe elevation is a liver emergency. Causes: acute viral hepatitis, paracetamol (acetaminophen) overdose, ischaemic hepatitis (shock liver), or severe drug reaction. Seek immediate medical attention if SGPT is more than 10 times the upper limit of normal.
SGPT vs SGOT — what's the difference?
SGPT is more liver-specific than SGOT
SGOT (AST) is found in the liver, heart, muscles and kidneys. SGPT (ALT) is almost exclusively in the liver. So a raised SGPT with normal SGOT points strongly to liver disease. A raised SGOT with normal or mildly raised SGPT may suggest heart attack, muscle damage or alcohol-related liver disease. The SGOT:SGPT ratio (De Ritis ratio) >2 suggests alcoholic liver disease.
Questions to ask your doctor
- Is my SGPT rise from fatty liver, medication or a virus?
- Should I test for Hepatitis B and C?
- Do I need a liver ultrasound?
- Which medications should I stop or reduce?