Abstract: An object of the present invention is to provide a safe and highly effective insulin resistance improving agent or therapeutic agent for type II diabetes. According to the present invention, an insulin resistance improving agent or a therapeutic agent for type II diabetes comprising a compound represented by general formula (I) (wherein R1, R2, and R3 are the same as or different from each other, and each represents lower alkyl, lower alkenyl, lower alkynyl, aralkyl, araryl, phenyl, or a hydrogen atom) or a salt thereof as an active ingredient can be provided.

Abstract: It is an objective of the present invention to provide a safe and highly effective hypertension-ameliorating agent. The present invention provides a hypertension-ameliorating agent, comprising a compound represented by general formula (I) (wherein R1, R2, and R3 are the same as or different from each other, and each represents lower alkyl, lower alkenyl, lower alkynyl, aralkyl, araryl, phenyl, or a hydrogen atom) or a salt thereof as an active ingredient.

Abstract: An object of the present invention is to provide a safe and highly effective insulin resistance improving agent or therapeutic agent for type II diabetes. According to the present invention, an insulin resistance improving agent or a therapeutic agent for type II diabetes comprising a compound represented by general formula (I) (wherein R1, R2, and R3 are the same as or different from each other, and each represents lower alkyl, lower alkenyl, lower alkynyl, aralkyl, araryl, phenyl, or a hydrogen atom) or a salt thereof as an active ingredient can be provided.

Abstract: An object of the present invention is to provide a therapeutic agent for diabetes mellitus or insulin resistance improving agent, or to provide foods and drinks, food and drink additives, and feeds or feed additives for treating diabetes mellitus or improving insulin diabetes. In order to achieve such an object, the present invention provides a therapeutic agent for diabetes mellitus and insulin resistance improving agent comprising hydroxyproline, a hydroxyproline derivative or a pharmaceutically acceptable salt thereof or foods and drinks, food and drink additives, feeds or feed additives for treatment of diabetes mellitus or improvement of insulin resistance comprising the same.

Abstract: An object of the present invention is to provide a therapeutic agent for diabetes mellitus or insulin resistance improving agent, or to provide foods and drinks, food and drink additives, and feeds or feed additives for treating diabetes mellitus or improving insulin diabetes. In order to achieve such an object, the present invention provides a therapeutic agent for diabetes mellitus and insulin resistance improving agent comprising hydroxyproline, a hydroxyproline derivative or a pharmaceutically acceptable salt thereof or foods and drinks, food and drink additives, feeds or feed additives for treatment of diabetes mellitus or improvement of insulin resistance comprising the same.

Abstract: The present invention provides a compound represented by formula (I): [wherein X—Y-Z represents R5N—C?O (wherein R5 represents a hydrogen atom, substituted or unsubstituted lower alkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted lower alkenyl, or substituted or unsubstituted lower alkynyl), etc; R1 and R2 may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, etc; and R3 and R4 may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, etc], or a pharmaceutically acceptable salt thereof.