ycle is regulated by the complex interaction of female hormones that control the start of menstruation during puberty, the rhythms and duration of menstrual cycles. Disturbances in hormone level may lead to abnormal menstrual flow like heavy or too light, may occur too often or last too long or may be irregular. M2-TONE is a comprehensive formulation for regulating the menstrual cycle and controlling related symptoms like pain, lethargy and stress.