Dietary supplements vs. Food

I see a interesting topic on Yahoo health news , it is a nice question...I think every body have this same questions too :
" Dietary supplements vs. food: Which is better? "
How about your opinion ? for my thought...I can not say that which one is better cause if we can have eat that contains enough vitamin that our body needs so we do not need to eat dietary supplements. So the questions is..have we eat enough ? How much is enough for our body ?
If we are not sure too..so the better thing is try to eat dietary supplements. If you have your thinking..we can share in here..