A fasting blood test requires you to avoid eating or drinking anything for some time before your test. The amount of time to fast varies for different tests. It’s generally in the range of 8 to 12 ...

The hemoglobin A1C test is a type of blood test. It provides information about your average blood sugar levels over the past two to three months. If you have type 2 diabetes, the test can help you ...

Test anxiety is something many students struggle with, but it’s often misunderstood. Most people think it’s caused by the pressure of limited time, tough material, or high expectations. However, as ...

Your doctor will usually check your red blood cell count together with your other blood cell counts to look for conditions that cause low counts (anemia) or high counts. Many health conditions can ...

It’s May. Hang around any high school—especially the junior class of any high school—and you will feel the torrent of teenage adrenaline and the nerves pulsing with test anxiety. SAT, ACT, AP exams, ...

During her time at CNET, Kim Wong-Shing loved demystifying the world of wellness to make it accessible to any reader. She was also passionate about exploring the intersections of health, history and ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Some of us are just ...

Thyroxine (T4) is the main hormone your thyroid makes. Your thyroid hormones are important because they control how your body uses energy from the food you eat. (Photo Credit: iStock/Getty Images) T4 ...

Vitamin D tests involve taking a blood sample to measure the vitamin D levels in your bloodstream. There are two forms of vitamin D in the blood: 25-hydroxy vitamin D, or calcidiol, and 1,25-dihydroxy ...