Meat colour stabilisation needs to be understood as myoglobin chemistry

A new laboratory study on beef colour puts caffeic acid at the centre of a practical question: how can browning be delayed without treating colour as an isolated attribute? The authors combined meat and model-system trials with physicochemical analyses, spectroscopy, atomic-force microscopy, molecular docking and molecular-dynamics simulations. Their aim was to describe the interaction between caffeic acid and myoglobin, the pigment that largely determines the perception of red meat colour.

In storage trials, a 0.1% concentration of caffeic acid significantly delayed browning and helped maintain the red colour of beef. The mechanistic findings point primarily to non-covalent binding with myoglobin, including hydrogen bonding. Microscopy also showed caffeic-acid-induced aggregation of myoglobin. The reported effect should therefore not be read merely as a generic antioxidant action, but as a specific interaction with the pigment system.

For processors, the relevance lies less in immediate application than in framing development work more accurately. Colour, oxidation, matrix, dosage, packaging and storage time need to be validated together. A favourable laboratory result does not replace testing in a commercial formulation, under the relevant packaging atmosphere and across the full shelf life. Effects on aroma and flavour, regulatory requirements and compatibility with other ingredients also require examination.