The physiologic effect of Methyl Paraben (Nipagin) is by means of Increased Histamine Release, and Cell-mediated Immunity. Methyl Paraben (Nipagin) is an antimicrobial agent, preservative, flavouring agent. Methyl Paraben (Nipagin) is a constituent of cloudberry, yellow passion fruit, white wine, botrytised wine and Bourbon vanilla.The physiologic effect of Methyl Paraben (Nipagin) has been shown to exhibit anti-microbial function.