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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

Michaela Kane
Contributor

Tsuyoshi Kaneko, MD
Contributor

Sunil Kapur, MD
Contributor

Martin Kathrins, MD
Contributor

Jeffrey Katz, MD, MS
Contributor

Sabra L. Katz-Wise, PhD
Contributor

Maneet Kaur, MD
Contributor

Nancy Keating, M.D., M.P.H.
Contributor

Alyson Kelley-Hedgepeth, MD
Contributor

John F. Kelly, PhD
Contributor

Sat Bir Singh Khalsa, Ph.D
Contributor

Adam Kibel, MD, MHCM
Editorial Advisory Board Member, Harvard Health Publishing

Laura Kiesel
Contributor

Hyun Jung Kim, MD
Contributor

Leo Kim, MD, PhD
Contributor

Davis Kimaiyo, MD
Contributor

George King, MD
Contributor

Daniel Kirshenbaum, MD
Contributor

Sarah Klein
Health Writer

Lauren Ko, MD, MEd
Contributor

Anthony L. Komaroff, MD
Editor in Chief, Harvard Health Letter; Editorial Advisory Board Member, Harvard Health Publishing

Megan A. Koster, MD, PharmD
Contributor; Editorial Advisory Board Member, Harvard Health Publishing

Parul Kothari, MD
Contributor

Arianne Shadi Kourosh, MD, MPH
Contributor

Suzanne Koven, MD, MFA
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