【摘要】 <正> 0 Introduction Activated Ca is a white natural powder material made and refined with special technique from the shell of a marineorganism oyster. It is the only kind of new Ca preparation which can be easily absorbed by human body at present. It is known as "natural food "," natural Ca preparation ", "product of times ", worth exploreing and applying. But the shortcoming is low solubility in water, only 884m~3/ 1000ml (at 25C). This article studies how to increase its sclubility so as to increase greatly the efficiency of the usage of activated Ca.更多还原