How many hours is considered enough sleep?

Sleep needs vary from person to person--and vary across a person's lifetime, says Michael Timothy Smith, MA, PhD, director of the Behavioral Sleep Medicine Program at Johns Hopkins University, in this HealthMakers video.

Learn how to feel energized after lunch—without coffee.

Why red blood cells are so important, and how these cells are affected by sickle cell disease.

A look at the early symptoms of ATTR peripheral neuropathy and ATTR cardiomyopathy.

Treatment for CIDP typically involves a multidisciplinary approach and multiple healthcare providers.

Do women really need more sleep than men? How much sleep is enough? Find answers to these common sleep health questions.