DH taking prenatal vitamins

In the beginning when I first found out I was pregnant, we went to a midwife ( now former midwife for unrelated reasons) and she gave us some free prenatal vitamins which were expired. I did some research and decided I did not feel comfortable taking expired prenatal vitamins . So my husband whom is very frugal decided to take them. Should I be concerned if the prenatal vitamins will have any effect on his health ?