According to the Oriental medical theory: Yin and Yang are two major principles. Yin means cold, negative, quiet and Yang means hot, positive and active. Yin and Yang have to be balanced. Menopause symptoms occur when Yin and Yang are out of balance. Deficiency of Yin gives people anxiety, insomnia, hot flashes, and low energy. This herbal formula specifically balances our body's Yin and Yang and women are able to get rid of the symptoms naturally.