Mar 21, 2025 · Find science-based health information on symptoms, diagnosis, treatments, research, clinical trials and more from NIH, the nation’s medical research agency.

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In general, it refers to physical and emotional well-being, especially that associated with normal functioning of the human body, absent of disease, pain (including mental pain), or injury.

Learn how exercise affects metabolism and which workouts have the greatest impact. Doctors no longer recommend daily aspirin for most people, yet many still take it despite limited benefit and...

Feb 2, 2026 · health, in humans, the extent of an individual’s continuing physical, emotional, mental, and social ability to cope with his or her environment. This definition is just one of many that are possible. …

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Find the best information about living a healthier life from the trusted medical team at Harvard Medical School. Trusted advice for a healthier life.