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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

How do we measure sun exposure?

A few measurements researchers use to quantify sun exposure are in units of “minimal erythemal doses” (MEDs) or units of “standard erythema doses” (SEDs). The names come from the concept that human skin generates an erythema (redness) in response to the sun’s intensity over a length of time.

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  About: Brant Cebulla

Brant Cebulla was a staff member for the Vitamin D Council from May 2011 to April 2014. He has keen interests in nutrition and exercise.