Prenatal Vitamins had black stuff on them. So I was taking my vitamin and noticed like micro tiny…

Prenatal Vitamins had black stuff on them. So I was taking my vitamin and noticed like micro tiny hairs just on a few you could wipe it off I mean it was smaller then an eye lash could it just be lent or something from the air because I have been taking them the whole time didn't know if it was anything to be concerned about .