[Samitin]

С сайта CDC ([Ссылки доступны только зарегистрированным пользователям ]):

Breast milk alone does not provide infants with an adequate amount of vitamin D, even if mothers are taking vitamins containing vitamin D. Shortly after birth, most infants will need an additional source of vitamin D.

To avoid developing a vitamin D deficiency, the American Academy of Pediatrics recommends breastfed and partially breastfed infants be supplemented with 400 IU per day of vitamin D beginning in the first few days of life. Vitamin D supplementation should be continued unless the infant is weaned to at least 1 liter per day (about 1 quart per day) of vitamin D–fortified formula. Any infant who receives <1 liter or 1 quart of formula per day needs an alternative way to get 400 IU/day of vitamin D, such as through vitamin D supplementation.

Точных рекомендаций, кажется, пока нет ([Ссылки доступны только зарегистрированным пользователям ]), в исследованиях были дозы, например, 6000-6400 МЕ/сут ([Ссылки доступны только зарегистрированным пользователям ]).