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Effects of sleep deprivation

Progressive relaxation techniques for insomnia

How to test for sleep apnea: At home or in a lab

How sleep deprivation can harm your health

Extreme heat endangers older adults: What to know and do

Want to cool down? 14 ideas to try

What is a PSA test and how is it used?

Blood sugar–friendly fruits if you have diabetes

Gratitude enhances health, brings happiness — and may even lengthen lives
Harvard Health Experts and Contributors
List of Experts

Shinjita Das, MD
Contributor

Emma Davies, MD
Contributor

Paul F. Dellaripa, MD
Contributor

Anne Densmore, Ed.D.

Neelam V. Desai, MD
Contributor

Nisa Desai, MD
Contributor

Jorg Dietrich, MD, PhD
Contributor

Amy Desrochers DiVasta, MD, MMSc
Contributor

Jake Dockterman, MD, PhD
Contributor

Sara W. Dong, MD
Contributor

Darshan Doshi, MD, MS
Contributor

Michelle Dossett, MD, PhD, MPH
Contributor

Caleb Dresser, MD, MPH
Contributor

Valeria Duque, Au.D., CCC-A
Contributor

How is PSA used to monitor prostate cancer?

Effects of sleep deprivation

Progressive relaxation techniques for insomnia

How to test for sleep apnea: At home or in a lab

How sleep deprivation can harm your health

Extreme heat endangers older adults: What to know and do

Want to cool down? 14 ideas to try

What is a PSA test and how is it used?

Blood sugar–friendly fruits if you have diabetes

Gratitude enhances health, brings happiness — and may even lengthen lives