[The experimental study on absorption and utilization of calcium from oyster shell powder mixed with fruit juice]

A new kind of calcium powder was prepared from the shell of oyster and the bones of other sea lives, in which fruit juice was mixed. This calcium powder and other four different forms of calcium (i.e., active calcium, gluconate, lactate, and phosphate) were fed to 4 groups of Wistar rats for 30 days. 3 days calcium metabolism test was done. The absorption and retention rates of calcium powder were 69.2% and 95.1% in the experimental group, which were higher than those in other calcium supplement groups (P < 0.05). The weight of femurs and the total calcium content of femurs had significantly increased in calcium powder group (P < 0.05). These findings indicated that calcium from calcium powder, which was prepared from sea lives and mixed fruit juice was more effective.