The upper limit for ALT (Alanine aminotransferase) and AST (Aspartate aminotransferase) can vary depending on the reference range used by the laboratory. In general, ALT levels above 45 U/L and AST levels above 40 U/L are considered higher than the upper limit of the normal range. However, it's important to note that the specific cutoffs may differ, and the interpretation should consider other factors, such as the individual's medical history, presence of symptoms, and additional diagnostic tests. Consulting with a healthcare professional is crucial for accurate evaluation and interpretation of ALT and AST levels in the context of the individual's health and possible liver conditions.
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