An S. Alanine Amino-Transferase (ALT) test—also known as SGPT—is a blood test used primarily to evaluate liver health. ALT is an enzyme found mostly inside your liver cells. When these cells are damaged or inflamed, they “leak” ALT into your bloodstream, causing your levels to rise.
While small amounts of ALT are always present in the blood, a significant spike is one of the most reliable early indicators of liver injury.
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