(I) One essential requirement of healthy nourishment is
that a meal must be complete. (II) In other words, it must
supply all types of nutrients, those used for structural
purposes (protein), those used for energy purposes
(carbohydrates and fats), and those used for regulatory
functions (minerals and vitamins). (III) Only consuming a
variety of products from different food groups will
guarantee the supply of diverse nutrients that the body
needs. (IV) One should not take up even a standard diet
without consulting with a doctor. (V) That is to say, only
a varied diet containing different types of food can
provide the body with the range of nutrients that it
requires.