AST
A second liver enzyme — but it also leaks from muscle. In lifters, a high AST is often a workout, not a liver.
What the numbers mean
These are the ranges BioForge works to. They are not the same as a lab's reference range, which is built from the general population rather than from people who feel well.
What moves AST
Same liver drivers as ALT, plus hard training, muscle damage, and creatine loading. If AST and ALT are both up, check CK — if CK is high too, the source is likely muscle. Avoid training for 48h before the draw.
Related markers in Liver, Bile & Pancreas
This page is educational and is not medical advice. Ranges are general and do not account for your history, medications or symptoms — a single number never decides a protocol. Your results are interpreted by a licensed clinician alongside everything else about you. Back to the Learning Center
Want to know where your numbers actually sit?
Every BioForge protocol starts from your own bloodwork. The first 15-to-30-minute call is free.