This is the first-ever blood test available for this common form of dementia. Here's how the new blood test works and why it could be useful to patients. Why do we need a blood test for Alzheimer's?

A CO2 blood test measures the amount of carbon dioxide (CO2) in your blood serum, the liquid part of your blood. It may also be called a carbon dioxide test, or a bicarbonate test. You may receive ...

A T4 blood test is used to check your thyroid function. It stands for thyroxine, which is a hormone made by the hormone glands. Learn about how the test works today.

Medically reviewed by Isabel Casimiro, MD, PhD A TSH test measures the level of thyroid-stimulating hormone in your blood. Abnormal TSH levels typically indicate a problem with your thyroid, like ...

The test, which consumers can order on their own, measures a protein linked to Alzheimer’s called amyloid beta. But it can’t diagnose cases, and the results may be needlessly stressful.

Doctors use a simple blood test to determine typical or atypical CO2 levels in the body. Learn about the CO2 blood test, and how to interpret the results, here.

A platelet aggregation test checks how well your platelets clump together to form blood clots. Platelets are a type of blood cell. They help form blood clots by sticking together. A clot is what ...

An arterial blood gas (ABG) test measures oxygen and carbon dioxide levels in your blood. It also measures your body’s acid-base (pH) level, which is usually in balance when you’re healthy.

Tiny Theranos vials with my blood Late last year I thought I'd try the Theranos lab test at a local Walgreens, but I was a little too early for their direct-to-consumer (DTC) process. Theranos ...

A blood test that can help diagnose Alzheimer’s disease has received clearance from the Food and Drug Administration. This is a step toward a goal of scientists and doctors to one day be able to ...

In order to qualify for the drug in the U.S., patients need to prove that they have amyloid in the brain, and a simple blood test could be a way to quickly identify those who might benefit.

New blood tests could help doctors diagnose Alzheimer’s disease faster and more accurately, researchers reported Sunday – but some appear to work far better than others. It’s tricky to tell if memory ...