Nutrient deficiencies can have a direct impact on menstrual health. For example, an iron deficiency can lead to anemia, resulting in heavy menstrual bleeding and fatigue. A deficiency in vitamin B6 or magnesium can cause premenstrual syndrome (PMS) symptoms such as mood swings, bloating, and irritability. Ensuring adequate intake of these nutrients can help regulate menstrual cycles and alleviate PMS symptoms.