Actually most of them are pretty natural (as much as processed food can be). They are fortified with vitamins just like cereals and other foods. There really aren't "artificial" vitamins (although synthetic vitamins exist, ex. dl-alpha tocopherol is the synthetic version of vitamin E). I think they are pretty tasty, but I am a big protein bar eater (some can be pretty nasty). I just wish they'd lose the sexist slogan "The Whole Nutrition Bar for WOMEN"