P-Anisic Acid Middel Preservative No known benefits P-Anisic Acid at a glance Has antioxidant + anti-inflammatory properties Primarily used as a preservative Fights bacterial and yeast contamination P-Anisic Acid description P-anisic acid, also known as 4-methoxybenzoic acid, is an isomer of anisic acid, a compound – specifically a plant metabolite - found naturally in anise (hence its name) and vanilla. While p-anisic acid has antioxidant and anti-inflammatory properties, its primary use in cosmetics is a fragrance enhancer and gentle preservative. Its antimicrobial properties fight both bacterial and yeast contamination in cosmetics, enabling them to be safer, more effective, and last longer. Although not a known irritant or sensitizer, p-anisic acid should be considered with caution by those allergic to aniseed ingredients. Related ingredients: Preservatives