With indoor living, clothing and avoiding the sun inadequate levels of vitamin D are being seen increasingly in the UK population as a whole.
- A nationwide survey published in the British Medical Journal found that more than 50% of the general adult population have insufficient levels of vitamin D, and that 16% have severe deficiency during winter and spring.
This can easily be remedied by ensuring some regular exposure to sunlight. Fifteen minutes each day of midday sun on the forearms and face without sunblock should produce sufficient vitamin D for Caucasians under the age of sixty. Those who have darker skin or who are older may require thirty minutes or more.
If this is not possible then of a supplement of 800-2,000 IU per day can be a good idea, especially in the winter months.