As of 1 April 2026, the PSJD database will become an archive and will no longer accept new data. Current publications from Polish scientific journals are available through the Library of Science: https://bibliotekanauki.pl
An adequate calcium intake is important to attain peak bone mass and to oppose that component of age-related bone loss. Calcium deficiency is one of the risk factors for osteoporosis. Calcium supplements is particularly important for preventing bone loss and fractures.