Characterized by a floppy heart valve, mitral valve prolapse is one of the most common heart valve problems, affecting up to 3 percent of Americans.

Almost one-third of U.S. adults 65 and older have this heart valve disorder that impedes blood flow from the heart.

Postural orthostatic tachycardia syndrome is a condition that causes rapid heart rate and affects between 1 and 3 million Americans—mainly premenopausal women.

These fatty acids are crucial for eye, neurological, and psychological health, but is supplementing heart-healthy? Explore both sides of the argument.

About half of U.S. adults have hypertension, yet only a quarter of them have it under control.

This fat-soluble antioxidant supports the immune system, keeps blood running smoothly, fights free radicals, and facilitates cell communiciation.

About one-quarter of the world population is believed to have contracted TB bacteria.