Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.5 and 5.0 milliunits per liter (mU/L). If your TSH level is higher than 5.0 mU/L it suggests an underactive thyroid, or ...

If you're like most primary care clinicians, your email inbox is flooded with messages from patients with questions about lab results. A common query: Should I be worried about an abnormal value on a ...

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.