A: A normal person needs 55% to 60% of the total calories a day, that is, 300 grams, so the maximum can't exceed 300 grams, and the minimum can't be less than 150 grams. In a meal, if it is divided into three meals, breakfast should be the time when carbohydrate intake is the highest, and the optimal intake is 150g-200g, while lunch should be around 100- 1200g, and dinner should be around 50- 100g. But it varies from person to person, because each of us has different exercise and metabolism, so carbohydrates should also be calculated according to everyone's physical condition.