 including some toxic metals like lead that has, quote, no safe exposure level. In other words, you could say, well, at a very, very low level, there's no safe level for lead. You just do not want to introduce lead any way, any how in your body. They say the future research is needed to determine whether metals can leach out of tampons and cross the vaginal epithelium into systemic circulation. So they're not entirely sure that these metals actually traverse the lining of the vagina and get into systemic circulation, but hey,