Q. I have a tendency to faint when I have blood tests and when I hear about medical procedures. What do these fainting episodes mean for my general health? Are there any supplements that can help? A.

The results of a home pregnancy test aren't always black or white (or clearly blue or pink!). If you see a faint line on a pregnancy test, especially if you took the test correctly, you're probably ...

It’s common for doctors to recommend getting bloodwork following a medical appointment or routine check-up. Blood tests can identify deficiencies in vitamins or minerals, immune system problems, or ...

You squint. You hold it up to the light. You take it to the window, then back to the bathroom. You snap a photo and enhance the brightness. Is that really a line? Or just your desperate hope ...

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.