5 to 55 ish is normal for ALT. My rheumy uses 50, which is annoying as mine was 54 this time around, so need to keep an eye on it.
But when I first started with the rheumy, they did a test called a GGT for liver, and mine was over 300, whereas the normal is, I believe 0-30ish. The rheumy was worried for a meds point of view (whether I could have them), but the GP wasn’t. I had a scan and nothing was found and everyone has lived happily ever after as they don’t do that test anymore! A similar scenario was an inflammation test should have been 0-20, I think, and was 109. And yet it was just the arthritis.
My point being, that just because a test comes back three or four times higher or lower than it should be doesn’t mean it’s anything to worry about. I find that all too often, we as patients have enough information on our health to scare the life out of us, but not the rest of the information which would probably put our minds at ease again! My understanding is that 3 times the normal ALT level is seen as a “mild” elevation.
If only I could talk to myself like that when I start worrying about test results!!!