Inclusion Criteria:  Subject is between 45 years and 65 years of age by the time of inclusion. Subject has been menopausal for at least 1 year, defined as 12 months after last bleeding and up to 10 years. Subject is Caucasian. Has a BMI below 35.0. Holder of a computer. Has a sufficient vitamin D status (plasma 25OHD concentration > 50 nmol/L). Subject is willing and able to provide written informed consent prior to participation.  Exclusion Criteria:  Subject taking supplements or medicine that affects calcium and bone metabolism e.g. diuretics or hormone replacement therapy evaluated by the investigator. Intake of antibiotics in the last 3 months before enrollment. Subject with an osteoporosis diagnosis or history of osteoporotic fractures. Presence of renal, gastrointestinal, hepatic or endocrinological diseases. Subject with any serious illness or history of cancer within the past 5 years (except adequately-treated localized basal cell skin cancer or in situ uterine cervical cancer). Known or suspected abuse of alcohol or recreational drugs. Known milk allergy. Known or suspected hypersensitivity to trial products or related products. Blood donation except from the donation in this study. Subject where it is not possible to obtain sufficient data.