I still give my 21 month old vitamin D. There’s a lot of research suggesting VD is important to infant development and adults as well. However the volume you wrote sounds like a lot. I’d try to find a more concentrated version with no additives beyond vitamin d and whatever oil it’s being reconstituted in. I hate when the vitamins I go to give my daughter has tons of sugar added. Zarbees and upspring are the brands I use routinely and I only need about .25-.3ml because theirs is concentrated. Nordic naturals is excellent too except theirs is a whole bottle dropper and impossible to drip into baby’s mouth easily.
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