Causes of endometriosis

Start at the Store: Prevent Foodborne Illness

By starting at the store with safe food handling practice, consumers can play a major role in preventing foodborne illness. In this new Consumer Update video, the U.S. Food and Drug Administration (FDA) provides tips for keeping food safe while guiding viewers through a grocery store.

Botox is Not Just for Wrinkles: Therapeutic Uses of Botox

A description of Botox (botulinum toxin) mechanism and uses in migraine, muscle spasms, and more.

• Botox

Macular degeneration

This animation shows the process of macular degeneration in the eye. The macula is the part of the retina that distinguishes fine details at the center of the field of vision. Macular degeneration results from a partial breakdown of the insulating layer between the retina and the choroid layer of blood vessels behind the retina. Macular degeneration results in the loss of central vision only.

• Vision

Core side exercises with fitness ball

You can do many core exercises with a fitness ball. See a side exercise.

How cancer spreads

Watch this video to see how cancer spreads (metastasizes).

• Cancer