High values are associated with gout, arthritis, kidney problems and the use of some diuretics. Enzymes AST, ALT, SGOT, SGPT, and GGT and Alkaline Phosphatase are abbreviations for proteins called enzymes which help all the chemical activities within cells to take place. Injury to cells release these enzymes into the blood. They are found in muscles, the liver and heart. Damage from alcohol and a number of diseases are reflected in high values.
Alkaline phosphatase is an enzyme found primarily in bones and the liver.
Low values are probably not significant. GGT is also elevated in liver disease, particularly with obstruction of bile ducts. Unlike the alkaline phosphatase it is not elevated with bone growth or damage. They may be elevated from liver problems, hepatitis, excess alcohol ingestion, muscle injury and recent heart attack. LDH is the enzyme present in all the cells in the body.