Abstract: Calcium deficiency is a worldwide health issue. The most important preventive and treatment measure for it is how to choose correctly effective calcium supplements. At present, the types and quality of calcium supplements-marketed are great different and there are many evaluation methods on absorbability and bioavailability of them. Most of calcium supplements on market are compound, which should be evaluated all-sided. In this review, the progress in the evaluation methods on absorbabil- ity and bioavailability of the calcium supplements was elucidated. The assessment methods were divided into two kinds, i.e. absorbability of calcium and bone effects. Advantages and disadvantages of each method were described respectively. A new technique of labeling calcium pool by stable isotopic, combined with bone histomorphometry may be considered as a new clue of the calcium supplements evaluation.

Key words: calcium supplement, calcium absorbobility, bioavailability, bone effectivity, evaluation