Make sure that at least 40 percent of vitamin A in the multi comes from beta-carotene. If you are a woman who is menstruating, choose a multi that contains 100 percent of the DV for iron for Constipatin Foods. If you are postmenopausal or male, choose a multi that either contains no iron or has less than 45 percent of the DV for iron. If you have premenstrual syndrome, opting for a supplement with the following amounts of the following nutrients may help alleviate irritability, fluid retention, joint aches, breast tenderness, anxiety, depression, and fatigue: Bu (100 micrograms), vitamin C (1,000 milligrams), vitamin E (400 international units), and magnesium (300 milligrams).