AST (SGOT, Aspartate Aminotransferase): What Your Result Means

What is AST (SGOT, Aspartate Aminotransferase)?

Aspartate aminotransferase populates hepatocyte mitochondria, cardiac myocytes, skeletal muscle, kidney, brain, and red cells. That distribution makes isolated AST elevations ambiguous — the liver-specificity prize goes to ALT. Ratio patterns restore diagnostic usefulness: AST:ALT >2:1 suggests alcohol; de Ritis ratio dynamics track specific processes.

Typical reference interval: Commonly 10–40 U/L.. Laboratories differ — the interval printed on YOUR report always governs.

If your AST (SGOT, Aspartate Aminotransferase) is high

Common reasons AST (SGOT, Aspartate Aminotransferase) runs above the reference interval:

• Alcoholic liver disease — ratio >2:1 classic — mitochondria-leaking mechanism
• Muscle sources — workouts, statin myopathy, rhabdomyolysis, IM injections, seizures
• Cardiac injury — troponin replaced AST here decades ago, but old habits persist
• Cirrhosis (any cause) — ratio inverts late-stage regardless of etiology
• Hemolysis — red cells carry AST — sample aging inflates
• Hypothyroidism — mild unexplained elevations occasionally
• Everything that raises ALT — shared hepatocellular causes

If your AST (SGOT, Aspartate Aminotransferase) is low

Common reasons AST (SGOT, Aspartate Aminotransferase) runs below the reference interval:

• Vitamin B6 deficiency — AST is B6-dependent — dialysis patients notably
• Pregnancy — physiologic mild decline

Symptoms worth knowing

Follows source organ: liver causes bring the jaundice/RUQ cluster; muscle causes bring weakness/myalgias/dark urine (myoglobin); cardiac causes bring chest symptomatology demanding immediate attention.

What usually happens next

1. Check ALT simultaneously — isolated AST elevation points AWAY from liver
2. CK testing settles muscle-vs-liver ambiguity instantly
3. Ratio interpretation assumes BOTH are genuinely elevated

Frequently asked questions about AST (SGOT, Aspartate Aminotransferase) results