Fifteen healthy , young men participated in a randomized 3 2-wk crossover study in which the following 3 isocaloric diets that were similar in fat contents and compositions were compared : control diet [ nondairy diet ( ~ 500 mg Ca/d ) ] , milk diet [ semiskimmed milk-based diet ( 1700 mg Ca/d ) ] , and cheese diet [ semihard cow-cheese-based diet ( 1700 mg Ca/d ) ] .