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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

Daniela J. Lamas, MD
Contributor

Adam Landman, MD, MS, MIS, MHS
Contributor

Adaira I. Landry, MD, MEd
Contributor

Gayle Lang, OTR/L, CHT, MS
Contributor

Helene Langevin, MD
Contributor

Debi LaPlante, PhD
Contributor

Nicole J. LeBlanc, MA
Contributor

Erica H. Lee, PhD
Contributor

Dara K. Lee Lewis, MD
Contributor; Editorial Advisory Board Member, Harvard Health Publishing

Anthony Lembo, MD
Contributor

Inga Lennes, MD, MPH, MBA
Contributor

Maureen Leonard, MD, MMSc
Contributor

Hallie Levine
Health Writer

Sharon Levy, MD, MPH
Contributor

Howard E. LeWine, MD
Chief Medical Editor, Harvard Health Publishing; Editorial Advisory Board Member, Harvard Health Publishing

Elizabeth Liebson, MD
Contributor

John Sanford Limouze, MD
Contributor

Jennifer Lin, MD
Contributor

Kristina Liu, MD, MHS
Contributor

Victor A. Lopez-Carmen, MPH
Guest Contributor

Kevin R. Loughlin, MD, MBA
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