There is no scientific basis for women to eat during menstruation without gaining weight. During menstruation, if you like to eat high-energy, high-fat food and usually eat more, you will also experience over-nutrition causing weight gain. Before menstruation, due to progesterone will be secreted increased, will lead to blood sodium retention in the body, so there will be premenstrual weight gain. After menstruation, hormone levels decrease, the body’s water decreases, coupled with the discharge of menstrual blood, the weight will be reduced, is a normal physiological change, and the magnitude will not be too large. Women should still pay attention to a reasonable diet during menstruation, to choose high protein, high vitamin food.