With the aging trend of society, the number of patients with hypertension, hyperlipidemia and diabetes is increasing year by year, and these three diseases often occur together. Dietary prevention and treatment of such diseases is particularly important, with the most stringent dietary restrictions for diabetes. 1, to calculate the ideal weight The formula for calculating the ideal weight: female: height (cm) – 105; male (height < 165 cm): height (cm) - 105; male (height > 165 cm): height (cm) – 110; If your weight is within 10% of the ideal weight of the earth, it can be considered normal, more than 20% is obese, less than 20% is wasting. For example, a male, 175 cm in height and 70 kg in weight, his ideal weight = 175-110 = 65 kg. The +10% range of 65 kg is 6.5 kg, that is, within the range of 58.5 kg (65-6.5) to 71.5 kg (65 ten 6.5) is the standard weight. The actual weight of 70 kg is within this range, which is the standard weight. 2.To determine the total amount of calories needed As an elderly person with ordinary activity, the amount of calories needed for each 13 kg of body weight according to fat and thin is: 20-25 kcal for normal weight; 30 kcal for thinness; 15-20 dry calories for obesity. Take the above example as an example, the normal weight is generally 20 kcal, if he is slightly more active, it is 25 kcal: Total calories needed = ideal weight * 25 = 65 x 25 = 1625 kcal (Note: Here we should use the calculated ideal weight of 65 kg, but not enough for the actual weight of 70 kg.) 3.Meal allocation The amount of food for the whole day can be divided into 3 or 4 meals according to the ratio of 1/5, 2/5, 2/5, or 1/3, 1/3, 1/3 or 1/7, 2/7, 2/7, 2/7.