Top 3 Sources of Vitamin D
According to Harvard School of Public Health, an estimated one billion people of all ages and ethnicities have insufficient levels of vitamin D, 'the sunshine vitamin', in their blood. When our skin is exposed to the sun's rays, it triggers a chemical reaction that produces vitamin D3. There are many factors that influence the amount of sunlight that reaches the skin and its effectiveness. The time of day, season, altitude, clothing, sunscreen use, pigmentation and age are some of these factors. Even those that reside in a sunny climate can be deficient in vitamin D due to cultural traditions and/or dress (National Institute of Health). If you don't get out for a 15-minute walk in the sunlight every day, the odds are you're deficient.
5 years ago