Vitamin D and Breastfeeding: What is the evidence?
For some years, it has been recommended in some countries that infants under one year of age take a supplement of 400 IU/day of vitamin D to prevent nutritional rickets. It is estimated that 80-90% of vitamin D is synthesized in the skin from the action of UVB radiation (1). Several factors influence vitamin D syntheses, such as skin pigmentation, latitude, time of day of sun exposure, use of sunscreens, and seasonality, being the winter months in the northern hemisphere,…