Читать книгу The Vitamin Cure - Monte Lai - Страница 24

Vitamin D has a host of health benefits, including maintaining healthy bones and lowering the risk of heart disease, stroke, asthma, inflammation, and autoimmune diseases. Vitamin D also may extend life expectancy.

The amount of sun exposure required to produce an adequate amount of vitamin D depends on the color of your skin and where you live. For example, to produce 1,000 IU of vitamin D in Chicago, Caucasians require 15 minutes, Asians and Hispanics 30 minutes, and Africans 2 hours. The best time for sun exposure is on a sunny day when your shadow is shorter than your height, during which time the skin is most efficiently producing vitamin D. People who live in places at or above the 43rd parallel north can only achieve this from May through September, so in the winter, they may have to rely on intake through vitamin D–rich foods or supplements to obtain adequate amounts of vitamin D.