Are vitamins dangerous?

[ArtMonkDrillz]

I had a nutrition professor in college tell our class that all vitamins are basically a scam because, unless you have a specific medical condition, you should be getting everything you need from a normal diet. Then again, this guy was really overweight and his belly would routinely hang out from under his sweater, causing me and my roommate to dry-heave, so take all that with a grain of salt and some St. Johns wart.