It is not recommended to take L-carnitine diet pills during menstruation. Taking diet pills during menstruation may lead to disruption of women’s hormone levels, which may make women’s menstrual flow abnormal. The body of a woman who is menstruating is already weak, and taking diet pills may affect the absorption of nutrients after eating, making the body even weaker or experiencing discomfort during menstruation. It is not recommended to take L-carnitine for weight loss either during menstruation or when there is no menstruation, as the weight loss effect can be seen during the period of using the drug, and will rebound after stopping the use of the drug. Regular use of L-carnitine can also cause endocrine disorders, women’s menstrual cycle may also change, menstrual disorders occur, usually through exercise, diet to lose weight is more healthy.