Normal Alt Levels By Age Chart

The chart summarizes the normal ALT levels (U/L) for different age groups, ranging from 5-60 U/L for newborns to 5-35 U/L for seniors.
Age Group Normal ALT Levels (U/L)
Newborns (0-1 month) 5-60 U/L
Infants (1-12 months) 10-40 U/L
Children (1-3 years) 10-60 U/L
Children (3-6 years) 10-30 U/L
Children (6-18 years) 10-40 U/L
Adults (18-60 years) 10-40 U/L
Seniors (>60 years) 5-35 U/L

The Normal ALT Levels By Age Chart provides a range of normal values for the alanine transaminase (ALT) enzyme levels based on different age groups. ALT levels are commonly used as an indicator of liver health. This chart categorizes the age groups into newborns (0-1 month), infants (1-12 months), children (1-3 years), children (3-6 years), children (6-18 years), adults (18-60 years), and seniors (>60 years). The corresponding normal ALT levels (in U/L) for each age group are also provided. This chart serves as a reference for healthcare professionals in assessing ALT levels in individuals of different age ranges.


What is a normal ALT level?

A normal ALT (alanine aminotransferase) level is typically considered to be between 7 and 55 units per liter (U/L) in adults.

How does age affect ALT levels?

ALT levels naturally tend to increase with age. In general, higher ALT levels are more common in older adults compared to younger individuals.

Are there different ALT level ranges for different age groups?

Yes, ALT level ranges can vary depending on the age group. For example, in children, normal ALT levels may range from 7 to 35 U/L, whereas in older adults, the upper limit of normal may extend up to 55 U/L.

What could high ALT levels indicate?

Elevated ALT levels may indicate liver damage or liver disease. Common causes include hepatitis (viral or autoimmune), fatty liver disease, alcohol abuse, certain medications, and other conditions affecting the liver.

Should I be concerned if my ALT level is slightly above the normal range?

Mildly elevated ALT levels may not necessarily indicate a serious health problem. However, it is advisable to consult with a healthcare professional to determine the underlying cause and take appropriate actions if needed.

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