| abstract |
The present invention provides a W/O/W multiple emulsion composition composed of an internal aqueous phase, an oil phase, and an external aqueous phase, the internal aqueous phase containing an ionic physiologically active substance and a physiologically acceptable compound having a molecular weight of 1,000 or less and generating a polyvalent counterion with two or more valencies for the ionic physiologically active substance. The W/O/W emulsion composition of the present invention not only can stably encapsulate a useful substance in its internal aqueous phase at a high encapsulation ratio, but also has high safety. |