ALT (alanine aminotransferase) — also called SGPT — is a key liver enzyme measured on most blood panels. When your ALT is above the laboratory’s reference range, it can signal that liver cells are irritated or releasing more enzyme than usual.
Mild elevations are common and often temporary. Context matters: alcohol intake, medications or supplements, viral illness, or even recent strenuous exercise can all raise ALT for a short time.
Each lab defines its own “normal” range, but a typical upper limit is around 35–45 U/L.
Values just above that limit are usually rechecked; higher or long-lasting elevations may lead to additional testing such as a full liver function panel or ultrasound.
If ALT rises briefly after illness, medications, or exercise, it often returns to normal within weeks.
The AI-LabTest interpretation engine analyzes your ALT and related liver markers using advanced medical reasoning frameworks. It compares trends — such as ALT/AST ratios, bilirubin levels, and ALP shifts — to explain what your numbers mean in context. The result is a clear, private summary you can review before your next doctor’s visit.
Is an ALT of 70 considered high?
In many laboratories, ALT values above the upper reference limit (often around 35–45 U/L) are considered elevated. A value around 70 U/L is usually in the mildly to moderately high range, especially if it stays elevated on repeat testing.
Can high ALT levels go back to normal?
Yes. ALT can return to normal once the main trigger is addressed — for example after recovery from a viral illness, adjusting medications, reducing alcohol intake, or improving metabolic factors such as weight and blood sugar. Follow-up testing helps confirm that it is trending back into range.
When should I worry about high ALT?
High ALT deserves closer attention when it is two to three times above the upper limit of normal, persists on repeated tests, or is accompanied by symptoms such as jaundice, dark urine, marked fatigue, abdominal pain, or other abnormal liver markers. In these situations, timely medical review is recommended.
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