The guiding principles of Meguiar's diet include controlling the total calorie intake, balancing the intake of three nutrients and properly controlling the intake of carbohydrates.

1, total calorie intake control: By calculating the basal metabolic rate and activity level of an individual, we can set a reasonable energy intake target and control the total calorie intake to achieve the purpose of losing weight or maintaining weight. 2, a balanced intake of three nutrients: a reasonable distribution of carbohydrates, protein and fat, to ensure the normal operation of various functions of the body.

3. Proper control of carbohydrate intake: Choose coarse grains, miscellaneous grains, vegetables, fruits and other foods rich in dietary fiber, and control the intake of flour and rice and sugar.