Brad Reisfeld is a professor of chemical and biological engineering, biomedical engineering, and public health at Colorado State University. Your blood serves numerous roles to maintain your health.

Blood tests are a simple and practical tool for understanding your health and guiding your care. Different types of blood ...

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 ...

What Does a Hematocrit Test Measure? A hematocrit test is a blood test that measures the level of red blood cells in your blood. Your blood is made up of plasma and blood cells. Plasma is the liquid ...

Dear S.P.: The symptoms of low thyroid levels can be very nonspecific. Fatigue or weakness, intolerance of cold temperatures, ...

I have low thyroid levels. My blood tests say that the levels are OK, but I still have all the symptoms. I received ...

Over 20% of people with the Duffy null variant are wrongly labelled ‘abnormal’, by current blood test ranges, leading to ...

If you've ever had a doctor order a blood test for you, chances are that they ran a complete blood count, or CBC. One of the most common blood tests in the world, CBC tests are run billions of times ...

Normal blood sugar levels are about 70-100 mg/dL. Your blood sugar will naturally fluctuate a bit throughout the day in response to food and other factors. However, it ideally stays within a set range ...

A novel blood test analyzing fragments of cell-free DNA showed robust diagnostic performance for colorectal cancer across clinical subgroups, offering a promising noninvasive screening method.