Premenstrual symptoms are a natural part of the menstrual cycle, affecting over 85% of women at some time during their lives. It is refers to the physical and emotional symptoms that occur during the one or two weeks before the beginning of menstruation (the time in a woman's monthly cycle when she bleeds, also known as a woman's period). Sometimes PMS symptoms last a few days after menstrual bleeding starts. Various supplements are useful for women during premenstrual period (PMS symptoms).