According the the National Institute of Health (NIH), American Dietetic Association (ADA), and the United States Department of Agriculture (USDA), one Centrum along with a 'proper' diet following the food guide pyramid will supply more then enough nutrients. Infact, if your intake of calories is high you may have to watch you don't exceed the upper limit recommendations for some nutrients.
A far as an increased need for nutrients in bodybuilders goes, the general consensus states thats there is no need for increased nutrient intake in 'natural' bodybuilders. Calories from protein, carbohydrates and fats are the only variable that would have to be increased.
Remember 'more' is not always better!