Preparing for a blood test involves simple steps to ensure accuracy and comfort. Follow doctor's instructions regarding fasting and medications, stay hydrated, and get good rest. Avoid alcohol, ...

What Is a RDW Blood Test? An RDW blood test – also known as a red blood cell distribution width blood test – is a measure of the difference in your red blood cells’ size and volume. RDW is one part of ...

The test may make it easier to identify whether people with memory and thinking problems have Alzheimer’s or not. By Pam Belluck A blood test that can help diagnose Alzheimer’s disease has received ...

What Is an MCHC Blood Test? A mean corpuscular hemoglobin concentration (MCHC) blood test measures the amount of a protein called hemoglobin in your red blood cells. It’s one of many measurements ...

But new research suggests that a simple blood test may be able to predict osteoporosis risk, allowing doctors to intervene ...

A TB blood test can find out whether you have the Mycobacterium tuberculosis bacteria in your body. Whether you need to get tested and how often depends on your specific circumstances. A blood test ...

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 ...

The FDA just approved a colon-cancer blood test. It could save people from spending hundreds of dollars on tests or relying on a colonoscopy alone.

It's a common condition involving hypertension with serious consequences when left untreated. A Dallas Ob-gyn explains why she thinks the test is a game-changer.

Grail's Galleri test screens for more than 50 different types of cancer from a single blood draw. (Getty Images) If you could take a simple blood test that could detect multiple types of cancer while ...