The sunshine D-lemma

Published: August, 2008

Sunlight causes skin cancer, but it also produces vitamin D, a substance that seems to prevent some types of cancer and possibly other diseases.

Carcinogen is a word that jumps off the page. It makes us think of nefarious chemicals and noxious pollutants.

To continue reading this article, you must log in.
  • 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

New subscriptions to Harvard Health Online are temporarily unavailable. Click the button below to learn about our other subscription offers.

Learn More »