The Food and Drug Administration is now warning that some babies may be getting too much.
According to the FDA, some of the droppers for the liquid supplements allow for extra-large doses that hold more than the 400 international units per day — the amount recommended by the AAP. Too much Vitamin D can cause nausea, vomiting, excessive thirst and frequent urination and other symptoms.
Vitamin D is necessary to help the body absorb calcium, which is necessary for developing healthy bones.
The FDA called on manufacturers to include droppers that are clearly marked for the 400 iu levels. And that supplements meant specifically for infants should include droppers that hold no more than 400 iu.