What is the ALT Test?

The ALT (Alanine Aminotransferase) test measures the level of an enzyme found primarily in your liver. When liver cells are damaged, they release ALT into your bloodstream, making it a valuable marker for liver health.

Normal ALT Ranges

Normal ALT levels typically range from:

  • Men: 7-56 units per liter (U/L)
  • Women: 7-45 units per liter (U/L)

Note: Reference ranges may vary slightly between laboratories.

What Does High ALT Mean?

Elevated ALT levels often indicate liver damage or inflammation. Common causes include:

  • Fatty liver disease: Often related to obesity, diabetes, or alcohol use
  • Hepatitis: Viral infections (Hepatitis A, B, or C)
  • Medication side effects: Certain antibiotics, statins, or pain relievers
  • Cirrhosis: Chronic liver damage and scarring

How to Improve Your ALT Levels

If you have elevated ALT, your doctor may recommend:

  • Lose weight: Even 5-10% weight loss can significantly reduce ALT
  • Exercise regularly: Aim for 150 minutes of moderate activity weekly
  • Limit alcohol: Reduce or eliminate alcohol consumption
  • Eat a healthy diet: Focus on vegetables, fruits, whole grains, and lean proteins

Understanding Your Results with Labisto

Use our free lab results interpreter to get instant, plain-English explanations of your ALT test and other liver function markers.

This information is for educational purposes only. Always consult your healthcare provider about your specific lab results.