Dr. Omar Al-Heeti is an assistant professor of medicine at Southern Illinois University and practices internal medicine with a specialty in infectious diseases. He received his medical degree from the ...

A vitamin B12 blood test is a reliable way to determine if you have adequate levels of this crucial nutrient. Vitamin B12 is ...

Blood tests can help with the diagnosis of autoimmune hepatitis. These include tests for increased liver enzymes or antibody levels. However, other tests are necessary to confirm the diagnosis.

Testing is essential when confirming a hemophilia diagnosis. The process includes a physical exam and blood-clotting factor ...

Blood draws for several kinds of diagnostic tests require you to fast for several hours. Eating or drinking anything besides water can skew the results, leading to you needing to be retested. You may ...