Vitamin D is a fat-soluble vitamin essential for calcium absorption so helps maintain bone health and is also important for muscular health. Sunlight is our main source of vitamin D – that’s why it’s often referred to as the ‘sunshine vitamin’. The body makes vitamin D under the skin when exposed to daylight; however in the UK this only occurs from around early April to September during the middle of the day due to the strength and latitude of the sun. Vitamin D is also present in some foods such as oily fish, eggs, cod liver oil and fortified products such as cereals and margarine.
A balanced diet and safe sunlight exposure should keep you topped up during the summer months. However in the autumn and winter due to the changes in the strength and latitude of the sun most people do not get adequate intake so it’s advised that we take a supplement during these seasons.