It is good to reduce food in moderation during menstruation. You can go on a diet, but don't starve yourself The absorption of food during menstruation is slightly slower than usual, so eating is not so easy to gain weight. If you want to lose weight, it is best to go on a diet within one week after menstruation, and the effect is the best. I like to get fat one week before menstruation. Lose weight slowly, step by step, not at once. Paying more attention to reasonable diet, strengthening exercise and taking part in outdoor activities are helpful to lose weight.