Herbal Supplement Natural Estrogen Balance Formulated by Kathleen K. Fry, MD Board Certified Gynecologist GMP Certified Estro-Logic is an exclusive, patented, clinically tested formula that offers natural plant derivatives, rich in isoflavones, which the body can use to maintain normal estrogen levels. Created by Kathleen Fry M.D., Gynecologist and Claudia Joy Wingo, Medical Herbalist, this unique combination of ingredients supports healthy hormone balance for women experiencing midlife changes. These ingredients have been proven effective in extensive studies.