Vitamin D is an important nutrient your body needs to work properly and stay healthy. It regulates the amount of calcium and phosphate in the body and helps keep our bones, teeth and muscles healthy.
Babies up to the age of 1 year need 8.5 to 10 micrograms of vitamin D a day. The NHS adds: "From about late March/early April to the end of September, the majority of people should be able to make all ...