organ · Biomarker
ALT (liver)
An enzyme that rises when liver cells are under stress or inflamed.
Clinical range
0–40 U/L
Longevity-optimal target
0–25 U/L
How to improve your ALT (liver)
Alcohol intake, body composition and some medications are the most common everyday drivers.
Frequently asked questions
What is a normal ALT (liver) level?
The standard clinical reference range for ALT (liver) is 0–40 U/L. Individual labs vary — interpret alongside your full picture and a clinician.
What is the optimal ALT (liver) for longevity?
A commonly-proposed longevity-oriented target for ALT (liver) is 0–25 U/L. This is a wellness convention, not a universal clinical threshold.
What does ALT (liver) measure?
An enzyme that rises when liver cells are under stress or inflamed.
How do I improve my ALT (liver)?
Alcohol intake, body composition and some medications are the most common everyday drivers. Educational only — confirm any change with your clinician.
Related markers
Educational information only — not medical advice, a diagnosis, or a recommendation to use any substance or therapy. Regulatory status changes; verify current rules and any personal decision with a licensed clinician. Jevity is operated by Upcapital Global FZCO, Dubai, UAE.