The claim that you won’t gain weight by eating during your physiological period is false and not reliable. The reason for this falsehood is mainly related to the change of hormone levels in the body. Before the onset of the physiological period, women’s progesterone levels rise, prone to water and sodium retention, resulting in edema and a slight increase in weight. After the physiological period, the body’s progesterone level decreases, the water in the body decreases, the edema is relieved, and then the weight will decrease than before the physiological period. Most of the weight gain and loss at this time is related to water and sodium retention in the body, i.e. less water in the body, which is a physiological weight change. If you eat normally during the physiological period and do not eat indiscriminately, you may lose one or two pounds when the physiological period is over. Some women experience tension before menstruation due to changes in hormone levels, causing an increase in appetite, and at this time, if they do not control their diet, they will also gain weight during the physiological period. If you know something about yourself, it is recommended to intentionally control your appetite during this period. Therefore, the physiological period is not not fat, but only the loss of some water, blood, not related to body fat, if you want to eat sweets or greasy food, especially too salty food during the physiological period, increasing water retention and fat accumulation in the body, and is not conducive to weight control.