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.

Painful cramps in the legs that get better with rest can be a sign of poor circulation. Skin color changes, such as appearing pale, bluish, or gray, indicate poor circulation. Brittle nails and hair ...

The anion gap blood test measures the acid-base and electrolyte balance in the blood. Results can show whether there is an imbalance in a person’s pH levels, which may be making the blood too acidic ...

Currently, doctors use ultrasound to measure blood flow in the body. Doppler effect, just like bats! But it can’t detect flow in the small, slow-moving vessels where diseases often start. The solution ...

Testing a person’s blood for a type of protein called phosphorylated tau, or p-tau, could be used to screen for Alzheimer’s disease with “high accuracy,” even before symptoms begin to show, a new ...

When her husband was undergoing cancer treatment, Cindy Perez of Southwest Ranches, Fla., learned about a new blood test that could help find early cancers. The 50-year-old said she felt fine, but her ...