Even if one doesn’t consume on pesach owned vitamins, supplements or other non medicines in pills (etc) does one have to worry if you dont know if they contain chometz? do you have to sell it with chometz?
As long as there is a chance that it contains chometz, it should be included in what you sell to the goy, as you are not eating it in any case, so put it with the goy’s things. If it is not going to be eaten because you know that it only contains kitnios, then there is no need to sell it to the goy.
Chag kasher v’sameach