Question of the Day

Very high GGT levels are seen with colostrum absorption.

In newborn calves, lambs, and pups, an increase in GGT up to a 1000 times is normal when they receive high levels of colostrum from the dam. In calves it takes four to six weeks for these GGT levels to return to the normal adult reference range. 

High levels of GGT are produced in the mammary epithelium during lactation. When evaluating bloodwork, make sure to utilize reference ranges specific for the age of the patient.