At-home testosterone test kits use a finger-prick blood sample, with results generally available within a week. Some companies also offer saliva-based tests, which are pain-free and easy to collect, ...

I watch as my crimson-red blood quickly fills two small glass vials, then gets packed into an ice-cold sleeve to be shipped off to a cancer-hunting lab. I've just completed my first cancer blood draw.

A serum immunofixation test measures specific proteins in your blood. It helps to identify certain illnesses that are otherwise hard to detect, such as multiple myeloma, a blood cancer. The test is ...

A D-dimer test measures how much D-dimer protein is in the blood. This protein is present when blood clots break down. A typical range is 0 to 0.50 micrograms per milliliter (μg/mL) of blood. Higher ...

Immunoassays are powerful analytical tools that exploit specific reactions that occur between antibodies and antigens in the immune system. They have proven invaluable in many biomedical applications, ...

Coughing up a large amount of bright red blood is an emergency and needs immediate medical attention. Treatment may include medications, intubation, or surgery, depending on the cause. Contact a ...