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Lisa, MSN, FNP-BC, CCRN, Nurse Practitioner
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What are the normal ranges of AST and ALT in the liver for a

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What are the normal ranges of AST and ALT in the liver for a 42 year old male
Submitted: 7 years ago.
Category: Health
Expert:  Lisa, MSN, FNP-BC, CCRN replied 7 years ago.

Thank you for writing in today. AST and ALT reference ranges can vary depending on which lab is used. However, in general, AST reference range is usually 5-35 units/L, and ALT is usually 7-56 units/L. Many different things, such as medications and viruses, can cause abnormal liver function levels. I hope this helps. If you would like to discuss this more in depth or you have additional follow up questions, please let me know. Lisa
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