Science has identified over 40 different essential nutrients - and no one food ingredient offers them all. Moreover, our body probably needs some nutrients that food scientists know nothing or little about. A diet rich in variety therefore stands a better chance of providing all the necessary nutrients. A varied diet also lessens the possibility of consuming an unhealthy amount of any single nutrient. Likewise, such a diet reduces the magnitude of exposure to unwholesome substances such as toxins and pathogenic microorganisms that any single food might harbor.
** Asian Recipes