Not all vitamins are created equal. Especially troubling, gummi "prenatal" vitamins that don't contain any calcium, thiamin, riboflavin, or iron. As Joss Fong points out at Double X Science, not only are pregnant women one of the few groups that can be shown to statistically benefit from taking vitamins, the missing iron is also one of the key things those women need. So why can you label a vitamin "prenatal" if it doesn't contain nutrients that are crucial to pregnant women? Consider this another friendly reminder that the dietary supplement industry is largely unregulated and doesn't have to answer to the FDA, except in a few, very specific circumstances.