in this case i recommend taking the doctor's advice not to worry. (smile) lab values can be tricky to interpret. the reference ranges you see on the lab results slip are based on samples from hundreds or thousands of healthy people. these results are averaged to get the reference ranges you see. but lab values can differ significantly from person to person and also across the lifespan. some lab values change with age some are different between men and women and sometimes an individual's "abnormal" lab value is in fact normal for that individual. your primary care provider knows you well and knows your health history. if he or she says your globulin level is fine for your age then i'd say don't worry about it. hope this helps!
my globulin level is 1. 8 quite low. my primary care said don't worry this is typical for my age. a 66 yr old male.