What is flavor enhancer 525?

Flavor enhancer 525 refers to guanylic acid. It is a naturally occurring substance that enhances the flavor of food. It is found in beef, pork, fish, mushrooms, and certain vegetables. It is also produced synthetically and used as a food additive. Guanylic acid is often used in combination with other flavor enhancers such as monosodium glutamate (MSG) to create a fuller, more rounded flavor.