How to use a peak flow meter

Bridge with fitness ball

You can do many core exercises with a fitness ball. See the bridge.

Warning on Body Building Products

In this Consumer Update video, FDA Product Safety Expert Deborah Autor, J.D., helps explain the agency's warning to stop using body building products that claim to contain steroids or steroid-like substances.

Esophagectomy

Esophagectomy video shows removal of esophagus for treatment of Barrett's esophagus and esophageal cancer.

Radiofrequency ablation of the esophagus

Radiofrequency ablation video shows high-frequency radio wave treatment for Barrett's esophagus and esophageal cancer.

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