Evidence is growing that we all need more vitamin D - and that low levels of it are causing serious and widespread health problems.
'Vitamin D plays a vital role in the diet,' says Bridget Benelam, nutrition scientist at the British Nutrition Foundation. 'It is easily absorbed by the body and is needed for the absorption of calcium and phosphorus, both bone-building nutrients.'
Our main source of vitamin D is the sun. An inactive form of the vitamin, called cholecalciterol, is triggered when the skin is exposed to sunlight. This is then taken by the bloodstream and stored in the muscles or in body fat, or it is passed through the liver and kidneys to become an active form of vitamin D.
Source - Daily Mail