Medically reviewed by Mary Choy, PharmD Key Takeaways Nicotine has a half-life of about two hours and can stay in the blood ...

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 ...

Eons before Europeans arrived in North America, Native Americans cultivated the tobacco leaf for ceremonial activities and medicinal purposes for use during prayers and rituals. They presented the ...

Now that there are drugs to treat Alzheimer's, blood tests to detect it will likely become an attractive, low-cost option to decide who can get treatment. Some tests are more accurate than others. A ...

The tests have not been approved by federal regulators, but that hasn’t stopped patients from wanting them — and doctors from worrying.

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.