Final answer:
Breastfed infants should receive 400 IUs of vitamin D per day during the first 2 months of life.
Step-by-step explanation:
During the first 2 months of life, all breastfed infants should receive 400 IUs of vitamin D per day.
Vitamin D is essential for bone health and development in infants. Breast milk is a good source of nutrients, but it may not provide enough vitamin D. Therefore, it is recommended to supplement breastfed infants with vitamin D to meet their daily requirement.
Some dietary sources of vitamin D include cod liver oil, fish liver oil, egg yolk, milk, and fortified foods.