The A/G ratio is a blood test that measures levels of albumin and globulin, the two main proteins in your blood. A high albumin to globulin (A/G) ratio may indicate kidney disease, an antibody ...

The A/G ratio measures the total amount of protein in your body by comparing the amount of albumin and globulin. Your healthcare provider may recommend this test as part of a routine protein test ...

But most serum cortisol is bound to corticosteroid-binding globulin and albumin, and serum free cortisol (which typically is not measured) is the physiologically active component of total cortisol.