Liver
ALT (liver enzyme)
Also known as: alanine aminotransferase, ALT/SGPT
What it is
ALT is an enzyme concentrated in liver cells. When those cells are inflamed or injured, ALT leaks into the blood, so it is a common part of a liver panel.
Why it matters
Raised ALT can reflect fatty liver, alcohol, medications or other causes, and mildly elevated levels are common and often metabolic. It is interpreted with other liver markers and your wider health.
What “optimal” looks like
Lower within the healthy range is generally preferred, and healthy ranges can differ by sex. A single mildly raised result is usually rechecked and viewed in context rather than in isolation.
This is general information, not medical advice or a diagnosis. Always discuss your results with a qualified clinician.
See your own ALT (liver enzyme)
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