<；P>；PROBLEM TO BE SOLVED: To provide a method for enhancing life activity and/or expanding suitable region for the life activity of a living body such as an animal or a plant in an aqueous solution which is the environment of the living body. <；P>；SOLUTION: The method for enhancing life activity and/or expanding suitable region for the life activity relates to a mineral concentration in the water-based environment to which the living body is contacting and brings &alpha；,&alpha；-trehalose and/or a carbohydrate derivative of &alpha；,&alpha；-trehalose to be present in a water-based environment to which the living body is contacting. A composition and an agent for enhancing the life activity and/or expanding the suitable region for the life activity of the living body are also provided. <；P>；COPYRIGHT: (C)2005,JPO&NCIPI
