A 30-year-old woman complains of increased body weight and problems with physical exertion. Her parents are of increased body weight as well; typical meals in their family are high in fats and carbohydrates. Objectively her blood pressure is 135/80 mm Hg, pulse is 89/min., weight is 87 kg, height is 165 cm. The patient’s skin is clear, with even distribution of subcutaneous fat; the thyroid gland is not enlarged; there are no menstrual cycle disturbances. What obesity prevention methods would be the most advisable in this case?