I will be starting a new position on Monday. They just told me there might be a risk of vitamin A powder exposure, since they fill vitamin A formulations into different packagings in the facility. I'm still nursing my 13 month old todler girl. Mostly evenig, once or twice a night and one time in the morning. Here is now my question. Does vitamin A enter into breastmilk, and if though how critical can this be? Do I have to wean her?