In a new supplemental combination and method of treatment, the herbs Vitex agnus-castus (chasteberry), green tea, and arginine treat premenstrual syndrome, premenstrual tension, as an alternative to conventional womens hormone replacement therapy, and to offset the problems related to sub-optimal hormone balance or decline resulting from age, genetics, stress, or environmental influences. Furthermore, the combination may be enhanced with a phytoestrogen and/or a progesterone-receptor enhancing agent.