![]() ![]() The wavelengths that stimulate the production of vitamin D do not pass through glass, so you must be outdoors. For the majority of the population the government recommends 10 minutes outdoors in the sun, between 11am and 3pm, with arms and legs exposed. It’s not possible to make too much vitamin D from the sun, as the body self-limits the amount it produces, but it’s very important to avoid burning. The body makes its own vitamin D from UVB rays (light with a short wavelength) which hit the skin. Group 3 had to eat 100g of oily fish, three times a week.Īll of the volunteers wore special devices to measure their sun exposure during the experiment – so that this could be factored in when their vitamin D levels were measured.Īfter three weeks of going out in the sun/ eating oily fish/ taking supplements, the volunteers had their vitamin D levels measured again to see how they’d changed.Group 2 had to take low dose vitamin D supplements daily.Group 1 had to get out into the sunshine for 10 minutes everyday, at lunchtime.Despite living in the sunniest part of the country, they seemed to be typical of the UK population as a whole: fewer than half have adequate vitamin D levels and two were at risk of vitamin D deficiency. We recruited volunteers from staff who work in an admin office at the University of Chichester. don’t have adequate levels of vitamin D, so what’s the best way to boost those levels? Michael Mosley, with the help of Professor Helen Macdonald from the University of Aberdeen, put three recommended sources of vitamin D to the test. Research suggests that around half of adults in the U.K. ![]()
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