SGPT (ALT): normal range and what it means
Short answer: The healthy SGPT (ALT) range HealthOS uses is < 30 U/L for men and < 25 U/L for women. Many labs print a wider reference range, so read your value against the one on your report too.
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Where does your SGPT (ALT) sit?
Same number as IU/L.
The healthy range is different for women and men.
Your result
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Information, not a diagnosis. Talk to a doctor about your result, and sooner if you feel unwell.
A liver enzyme — the most specific marker of liver-cell stress.
Normal range
This marker’s healthy range depends on sex and age.
| Normal range | Men | Women |
|---|---|---|
| Optimal | < 30 U/L | < 25 U/L |
| Borderline | 30 – 40 U/L | 25 – 33 U/L |
| High | ≥ 40 U/L | ≥ 33 U/L |
What it measures
An enzyme concentrated in the liver. Elevated levels suggest the liver is under strain — often from fat build-up.
What moves it
Fatty liver, alcohol, medications, and rapid weight change.
How to bring it into range
Fat loss, less alcohol and sugar, and exercise.
How fast it responds
Weeks to months.
Also reported as: alt · alanine aminotransferase · sgpt
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Common questions
- What is the normal SGPT (ALT) range?
- The healthy SGPT (ALT) range HealthOS uses is < 30 U/L for men and < 25 U/L for women. Many labs print a wider reference range, so read your value against the one on your report too.
- What does a high SGPT (ALT) mean?
- A value above the reference band means SGPT (ALT) is outside the range typical for a healthy adult. A single reading is rarely conclusive on its own — what matters is the trend across draws and the other markers around it, which is why HealthOS reads the whole panel together rather than one number at a time.
- How do I improve my SGPT (ALT)?
- Fat loss, less alcohol and sugar, and exercise.
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Reference ranges are general-population guidance compiled from common clinical laboratories, not a diagnosis. Lab-to-lab ranges differ. Always read your results with your doctor.