Choosing to breastfeed your baby is an important decision. Breast milk is a most perfect source of nutrients because it is composed of the right amounts and appropriate types of fat, carbohydrates and proteins that infants require. However, same as it is difficult for adults to obtain their vitamin D from food, breastfed babies also need to obtain their vitamin D from a combination of the sun, food and supplements. Breast milk contains only 10% of the recommended daily intake of vitamin D. Babies need vitamin D for healthy growth and development. In particular, bones require vitamin D to help with the absorption of calcium. Recent studies show that more vitamin D or sunshine during infancy seems to prevent other diseases later in life, such as juvenile diabetes or multiple sclerosis. The Canadian Paediatric Society and the American Academy of Pediatrics recommend that breastfed infants receive a daily dose of 400 IU vitamin D supplementation.