Recent Blog Articles

Close relationships with neighbors influence cardiovascular health in Black adults

Why play? Early games build bonds and brain

5 numbers linked to ideal heart health

Rating the drugs in drug ads

Postpartum anxiety is invisible, but common and treatable

The popularity of microdosing of psychedelics: What does the science say?

Pouring from an empty cup? Three ways to refill emotionally

Is pregnancy safe for everyone?

New pediatric guidelines on obesity in children and teens

Screening tests may save lives — so when is it time to stop?
Staying Healthy
How to hydrate
- By Matthew Solan, Executive Editor, Harvard Men's Health Watch
Proper hydration is vital all year round. Here’s how to keep your daily water intake flowing.
Humans can live for about three weeks without food, but they can last only three or four days without water.
Even though the liquid is essential for life, an estimated 40% of seniors are chronically underhydrated, and adults ages 65 and older have the highest hospital admission rates for dehydration.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.
Sign Me UpAlready a member? Login ».
About the Author

Matthew Solan, Executive Editor, Harvard Men's Health Watch
Disclaimer:
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
You might also be interested in…

Living Better, Living Longer
With this Special Health Report, Living Better, Living Longer, you will learn the protective steps doctors recommend for keeping your mind and body fit for an active and rewarding life. You’ll get tips for diet and exercise, preventive screenings, reducing the risk of coronary disease, strengthening bones, lessening joint aches, and assuring that your sight, hearing, and memory all stay sharp. Plus, you’ll get authoritative guidance to help you stretch your health care dollar, select a health plan that meets your needs, prepare a health care proxy, and more.
Free Healthbeat Signup
Get the latest in health news delivered to your inbox!