Deficiency in Vitamin D in the U.K. and particularly in Scotland is widespread.
Vitamin D is produced in the body by the sun hitting the skin. The particular wavelength required to produce vitamin D from the sun is only available for three or four months in the summer barring rain and cloud. Also, the skin needs to be exposed at the hottest time of the day for about 15 minutes. It is of course very important that the skin does not burn since that can lead to skin cancer. A small amount of vitamin D is obtained from our diet. Foods such as oily fish, eggs and fortified cereals contain the vitamin.