Question: what is ig in labs?
Answer: This test measures the amount of immunoglobulins, also known as antibodies, in your blood. ... An immunoglobulins test usually measures three specific types of immunoglobulins. They are called igG, igM, and IgA. If your levels of igG, igM, or IgA are too low or too high, it may be a sign of a serious health problem.