Sets of vitamins and minerals, prepared especially for women, contain all the necessary micro and macro elements, but special attention focused on few key elements. First of all the B vitamins regulate metabolism, as well as hunger and appetite. Vitamin B12 along with the proper amount and form of iron is used to enhance the increase of the production of red blood cells and hemoglobin - which is particularly important during menstrual cycles, where blood loss, and thus blood forming substances are significant. The addition of iodine helps to optimize the work of thyroid hormones. A common practice is adding the ginseng, which has stimulating effect, to complexes of vitamin and mineral supplements. And also horsetail is added for improving the appearance of the skin, hair and nails.