Is vitamin d supplementation really necessary for a breastfed infant if you take him outside to get sun every day? wasnt it not recommended until just recently? how common is rickets and will that happen if we dont supplement?

If you follow official recommendations of the American Academy of Pediatrics, you supplement with Vitamin D for the first year of life. Vitamin A, C and D supplementation has been recommended for over sixty years. At 1 year of age, vitamin D fortified milk can be added to the diet. The longer without adequate vitamin D, the higher the risk of rickets and associated bony deformities.