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  1. What Liver Enzymes Do and What Levels Are Normal

    Dec 2, 2025 · An AST/ALT ratio of less than 1 (where the ALT is higher than the AST) is a general indication of fatty liver disease. An AST/ALT ratio equal to 1 (where the ALT is equal to the AST) may …

  2. Liver function tests - Mayo Clinic

    Jan 18, 2025 · When the liver is damaged, ALT is released into the bloodstream and levels increase. This test is sometimes referred to as SGPT. Aspartate transaminase (AST). AST is an enzyme that …

  3. What are AST and ALT in a blood test? | SiPhox Health

    Jul 25, 2025 · Learn what AST and ALT liver enzymes mean in blood tests, their normal ranges, causes of elevation, and how to improve liver health naturally.

  4. ALT Blood Test: MedlinePlus Medical Test

    An ALT blood test checks the health of your liver. ALT is a liver enzyme that gets released into your blood when liver cells are damaged. Learn more.

  5. What Is an Alanine Aminotransferase (ALT) Test? - WebMD

    Jan 29, 2025 · What Is an ALT Blood Test? The alanine aminotransferase (ALT) test is a blood test that checks for liver damage. ALT used to be called serum glutamic-pyruvic transaminase (SGPT). Your...

  6. AST/ALT Ratio Chart: What the Numbers Indicate

    Jul 25, 2025 · Among these, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are routinely checked markers. These enzymes provide a window into the state of your liver, helping …

  7. Alanine Transaminase (ALT) Blood Test: What It Is, Procedure & Results

    Aspartate transferase (AST) is another enzyme that’s commonly measured along with AST in a liver function panel or comprehensive metabolic panel. Both of these enzymes can leak into your …

  8. Liver Blood Tests: High, Low & Normal Results, Symptoms & Causes

    Understand the result with high, low, and normal results of AST and ALT. Symptoms of elevated or high liver enzymes in the blood include fever, abdominal pain, poor appetite, itching, and nausea. …

  9. Why Are My ALT and AST High on a Liver Function Test?

    Aug 4, 2025 · Why Are My ALT and AST High on a Liver Function Test? An ALT above 35 U/L in women or 45 U/L in men, and an AST above 40 U/L, signal liver-cell irritation. The most common …

  10. How to approach elevated liver enzymes? | AASLD

    ALT is more specific to liver injury because of its greatest concentration in the liver, while AST can also be found in extrahepatic organs, including brain, heart, and skeletal muscle. The degree of …