Estradiol treatment or modest exercise improves hepatic health and mitochondrial outcomes in female mice following ovariectomy American Journal of Physiology Endocrinology and Metabolism American Physiological Society Estriol Estradiol Topical Hormone Cream with Shea Butter Swanson Vitamins L carnitine improves polycystic ovary syndrome by increasing CYP11A1, estrogen receptor, and decreasing XNIP and VEGF expression Naunyn Schmiedeberg's Archives of Pharmacology Springer Nature Link L carnitine for metabolism Lifehack