Vanillin

Artificial vanilla flavor, generally safe but not natural vanilla extract.

A synthetic flavoring identical to the main compound in vanilla. It is considered safe at food levels but is an artificial flavoring rather than real vanilla.

A synthetic flavoring compound that mimics natural vanilla. It is considered safe by regulators, but it is an artificial additive and some consumers prefer natural vanilla.

Vanillin is a synthetic flavor compound that is generally recognized as safe and used at very low levels. It is rated yellow as a flavoring that mimics natural vanilla instead of real vanilla, which signals a more processed product.