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Old 08-03-2013, 04:38 PM
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Dr. Smith Dr. Smith is offline
Senior Member (**Dr Smith is named after a character from Lost in Space, not a medical doctor)
Dr. Smith's Avatar
 
Join Date: Oct 2010
Location: Lost in Space
Posts: 3,515
10 yr Member
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Humans make their own vitamin D from exposure to sunlight. However in recent years, with a thinning/perforated ozone layer and rising skin cancer rates, people don't spend as much time in direct sunlight as they used to. Today, Americans get most of their vitamin D via fortified foods, which may not nearly be enough (e.g. milk is fortified w/ only 100IU/cup in US).

See: Office of Dietary Supplements fact sheet: Vitamin D

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Dr. Zachary Smith
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Dr. Smith is NOT a medical doctor. He was a character from LOST IN SPACE.
All opinions expressed are my own. For medical advice/opinion, consult your doctor.
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