Propyl Gallate

Propionic acid, also known as propanoic acid, has the chemical formula C₃H₆O₂. It is a byproduct of fermentation reactions and can be synthesized from ethylene or ethanol and carbon monoxide. It is most commonly used as a preservative in food as it slows and prevents the growth of mold and bacteria. You will find this ingredient in baked goods and cheeses. Propionic acid is safe for use in small quantities in food, but has been suggested to alter metabolism, elevate glucose levels, and increase insulin resistance.