Lower doses of HRT protect bones.
D015519:Bone Density / Q000187:drug effects*; D001842:Bone and Bones / Q000187:drug effects*; D015914:Estrogen Replacement Therapy; D004967:Estrogens / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D015663:Osteoporosis, Postmenopausal / Q000517:prevention & control
D004967:Estrogens