SGPT is also called as alanine aminotransferase or ALT in newer classification and reporting. Isolated normal SGPT levels in Blood for men was an ALT of 29 international unit/L and for women was an ALT of 22 international unit/L. Alt level in case alone escalated may be due to obesity and abdominal fats. Its ratio with SGOT to ALT is often to be considered for any co-relation to a faulty liver function. This ratio AST to ALT ratio if found to be 2:1 or greater is suggestive of alcoholic liver disease. More can be stated with conditions. wish this helps so far.