It is a further object of the present invention to provide that when R2 is a hydrogen atom, n is preferably 0, and the inflammation inhibitor comprises a zinc salt of an acylamino acid comprising: wherein, in the formula (II), R4 represents an acyl group having 2 to 22 carbon atoms, R5 represents a side chain selected from the group consisting of valine, leucine, isoleucine, phenylalanine, methion