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Also reported in: U/L
A normal ALT level means liver cells are generally intact and not noticeably damaged or inflamed. ALT is one of the most sensitive markers for liver cell injury and a normal result effectively rules out significant active hepatitis or toxic liver injury. Normal ALT alone does not rule out all forms of liver disease, but it is reassuring.
ALT is an enzyme that lives inside liver cells and spills into the blood when those cells are damaged or inflamed. A very low ALT means liver cells are intact and not releasing this enzyme into the bloodstream. This is an excellent sign that the liver is not under inflammatory or toxic stress.
Very low ALT is a good liver health sign. No action needed.
ALT: {{value}} {{unit}} — very low (ref: {{low}}–{{high}})A low ALT indicates that liver cells are intact and releasing minimal amounts of this enzyme into the blood. Healthy, undamaged liver cells keep ALT contained inside them. Low ALT provides reassurance that no active liver inflammation or hepatocyte injury is occurring.
Good result. No liver cell damage detectable from this marker.
ALT: {{value}} {{unit}} — low (ref: {{low}}–{{high}})A borderline low ALT is a reassuring result, indicating minimal liver cell stress or damage. The liver is not releasing significant amounts of this enzyme, which only happens when liver cells are injured or inflamed. This level is compatible with healthy liver function.
No action needed. Healthy liver indicator.
ALT: {{value}} {{unit}} — low normal (ref: {{low}}–{{high}})A normal ALT level means liver cells are generally intact and not noticeably damaged or inflamed. ALT is one of the most sensitive markers for liver cell injury and a normal result effectively rules out significant active hepatitis or toxic liver injury. Normal ALT alone does not rule out all forms of liver disease, but it is reassuring.
Good result. Maintain liver health by avoiding excess alcohol, maintaining healthy weight, and limiting unnecessary medications.
ALT: {{value}} {{unit}} — normal (ref: {{low}}–{{high}})An optimal ALT below 35 IU/L means the liver is in an undamaged, low-stress state. Liver cells are maintaining their enzyme content without leaking. Consistently optimal ALT over time is associated with lower risk of liver disease progression, metabolic syndrome complications, and liver-related mortality.
Excellent liver marker result. Continue liver-protective habits: moderate or no alcohol, healthy weight, regular exercise.
ALT: {{value}} {{unit}} — optimal (ref: 7–35)A borderline elevated ALT means some liver cell injury or inflammation is detectable. At this level it can reflect fatty liver disease (Fatty liver not from alcohol (NAFLD)), alcohol consumption, certain medications (statins, antibiotics), or vigorous exercise causing mild muscle-liver ALT release. It is not an emergency, but it warrants investigation because persistent mild elevation can progress.
Discuss with your doctor. Alcohol reduction, weight loss if overweight, and medication review are the first steps. Repeat ALT in 1–3 months to track the trend.
ALT: {{value}} {{unit}} — borderline elevated (ref: {{low}}–{{high}}; borderline: 40–80)A noticeably elevated ALT means the liver is under substantial stress with active cell injury. At this level, the hepatocytes (liver cells) are damaged enough to release large quantities of ALT into the bloodstream. Common may contribute to include fatty liver disease, alcohol-related hepatitis, viral hepatitis (B or C), autoimmune hepatitis, or drug-induced liver injury.
See your doctor soon. Further tests including full liver panel, hepatitis B and C screening, liver ultrasound, and medication review are typically needed to identify the cause.
ALT: {{value}} {{unit}} — elevated (ref: {{low}}–{{high}}; elevated: >80)A very high ALT above 300 IU/L indicates massive liver cell death or noticeable inflammatory damage. This level is seen in acute viral hepatitis, noticeable drug-induced liver injury (including acetaminophen toxicity), autoimmune hepatitis flares, or ischemic hepatitis (shock liver). The liver is releasing enormous quantities of this enzyme as cells rupture and die.
Go to the emergency room immediately or contact your doctor urgently. Very high ALT requires hospital-level evaluation and management to prevent liver failure.
ALT: {{value}} {{unit}} — very high (ref: {{low}}–{{high}}; critical: >300)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.