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 ...

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 ...

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 ...

I had an eye issue last year that led to blood tests resulting in an elevated A1C. I said that it wasn’t my blood; I am plant-based, exercise regularly and don’t drink sodas or alcoholic beverages. Of ...

The White House released the results of President Donald Trump's recent advanced imaging tests on Monday, describing them as ...

Sarah is an experienced writer and editor enthusiastic about helping readers live their healthiest and happiest lives. Before joining Forbes Health, Sarah worked as a writer for various digital ...