Smart Food Label which can identify the freshness of high protein food. The core technology of the smart food label is Biogenic sensing technology. A unique iron-based molecular complex was designed and synthesized as a chemosensor for detecting biogenic amine which will be released from spoiled food. The chemosensor has a very deep green color. The chemosensor is injected into the smart food label.

Upon contacting the vapor of biogenic amines, the label will react with biogenic amine gas that shows a distinctive red-orange color. Consequently, the user can know the freshness of food through the colour of the label.