Intestinal AbsorptionOmeprazoleCalciumCalcium, DietaryCalcium IsotopesCalcitriolPostmenopauseDihydroxycholecalciferolsCalcium Metabolism DisordersCalbindinsHydroxycholecalciferolsS100 Calcium Binding Protein GAnti-Ulcer AgentsCalcium RadioisotopesAbsorptionVitamin DBone and BonesParathyroid HormoneStrontiumIntestinesPhosphorusOsteoporosis, PostmenopausalDuodenumCholecalciferolCalcifediolBone DensityVitamin D DeficiencyGastric AcidReceptors, CalcitriolEstrogen Replacement TherapyMinerals25-Hydroxyvitamin D3 1-alpha-HydroxylaseTRPV Cation ChannelsGastric Acidity DeterminationProton Pump InhibitorsCross-Over StudiesCalcium CarbonateMenopauseRicketsPhosphatesDouble-Blind Method2-PyridinylmethylsulfinylbenzimidazolesBenzimidazolesRanitidineDrug InteractionsPremenopauseEstrogens, Conjugated (USP)EstrogensHistamine H2 AntagonistsWomen's HealthCalcium ChannelsCalcium SignalingBreast NeoplasmsDietAromatase InhibitorsEstradiolBone Density Conservation AgentsDihydrotachysterolArea Under CurveOvariectomyHormone Replacement TherapyOsteoporosisGastric MucosaBiological AvailabilityRisk FactorsEstroneNitrilesHydrogen-Ion ConcentrationIsoflavonesAdministration, OralSex Hormone-Binding GlobulinTamoxifenBiological Transport, ActiveKidney CalculiMedroxyprogesterone AcetateTriazolesAbsorptiometry, PhotonIntestinal MucosaRaloxifeneCalcium CitrateWomenAntineoplastic Agents, HormonalErgocalciferolsDietary SupplementsTime FactorsIntestine, SmallProgestinsGonadal Steroid HormonesDuodenal UlcerLansoprazoleClimactericMagnesiumFractures, BoneMedroxyprogesteroneHot FlashesBone ResorptionCase-Control StudiesAgingRats, Sprague-DawleySoybean Proteins