Health Articles: Tests, Conditions and Treatments

AST over 1000 isn't always the liver. Muscle breakdown can push it this high too, and a creatine kinase test helps show which one it is.

Supplements raise liver enzymes differently: high-dose vitamin A can scar the liver while AST stays only 1 to 4 times the upper limit.

Tylenol and a high AST don't always mean overdose: at 4 grams a day, liver enzymes rose above three times normal in 39% of people, mostly without symptoms.

Hepatitis AST and ALT can look reassuring when they aren't: in one study, 9% of people
with hepatitis C and near-normal ALT had bridging fibrosis.

MASLD AST ALT patterns tell two stories. In a Hiroshima study of non-drinkers with fatty liver, the median AST/ALT ratio was 0.73. Here's when that flips.

Alcohol and AST don't reset overnight. Half of AST clears in about 17 hours, yet ongoing liver injury can keep it high for days. Here's the timeline.

Liver enzyme limits by sex differ: 33 U/L tops the ACG's healthy ALT range for men, 25 for women. So why might your lab print a higher number?

Rhabdomyolysis raises AST because muscle holds the enzyme too, yet dark urine or severe muscle pain, not the lab number, is what sends you to the ER.

An AST/ALT ratio below 1 says little alone: in a 515-patient fatty liver biopsy study, advanced scarring was similarly common with normal enzymes.

FIB-4 calculator math is simple, yet in one US study 10% of low-risk results were not low risk on stiffness testing. See what that means.