# NHLBI: Sleep Deprivation and Deficiency

National Heart, Lung, and Blood Institute guide to sleep needs, sleep deficiency and its health effects.

The NHLBI, part of the National Institutes of Health, publishes evidence-based information on how much sleep people need, causes and health effects of sleep deficiency, and how to improve sleep. It also covers sleep apnea and links to NIH research.

Price: Free public resource. Site: https://www.nhlbi.nih.gov/health/sleep-deprivation.

Also on the [web page](https://sleepstudies.fyi/apps/nhlbi-sleep-deprivation).