Not all asymptomatic people with a mildly elevated liver enzyme value need an extensive evaluation, which can be . High AST, ALT suggest liver cell damage. Hi I had a blood test two weeks ago and i called the clinic today and they said everything was fine (CBC, Diabetes, Cholesterol, Liver tests). Elevated liver enzymes: Symptom — Overview covers definition, possible causes Alanine transaminase (ALT); Aspartate transaminase (AST). Liver Blood Tests - Diagnosis Please describe how Liver Blood Tests has helped in your diagnosis. ALT is one of these enzymes. Medical Dictionary or A-Z List. Low levels of ALT are normally found in the blood. Mayo Clinic Health Letter.