Dietary calcium may be better for bones than calcium pills.
D015519:Bone Density / Q000502:physiology*; D002136:Calcium, Dietary / Q000008:administration & dosage*; D019587:Dietary Supplements; D004967:Estrogens / Q000378:metabolism; D005260:Female; D006801:Humans
D002136:Calcium, Dietary; D004967:Estrogens