OSTEOPOROSIS AND BONE METABOLIC PARAMETERS IN DEPENDENCE UPON CALCIUMINTAKE THROUGH MILK AND MILK-PRODUCTS

The bone mineral content of young adults as well as of osteoporotic pa tients and age-matched controls without bone disease was measured by s ingle-photon absorptiometry, A retrospective nutrition survey was addi tionally made to study the relationship between bone mineral content a nd calcium intake in different periods of life. The bone mineral conte nt and bone mineral density of young adults is directly related to the calcium intake through milk and dairy products. The osteoporotics had a significantly lower bone mineral content than the controls. Calcium intake through milk and milk products in childhood and adolescence ha d been significantly lower in the patients than in the controls, where as in the later periods of life (20-30 years prior to the study and at the time of the study) there were no significant differences between the calcium intakes of the two groups. It was also found that an adequ ate intake of calcium protected against increased bone resorption, as evidenced in particular by the reduced levels of serum osteocalcin, a parameter of bone turnover. In conclusion it can be stated that the da ta support the hypothesis that adequate calcium intake through milk an d milk products in childhood and adolescence is a decisive marker for obtaining a maximum bone mass (peak adult bone mass) and for the preve ntion of osteoporosis. Furthermore, it can be stated that increased ca lcium intake in the later years may not reduce the accelerated risk of osteoporosis resulting from inadequate calcium intake during childhoo d and adolescence.