why

The presence of albumin, a type of protein, in meat is a natural occurrence. However, elevated levels of albumin are often associated with lower quality meat. This is because certain pre-slaughter and post-slaughter conditions can impact protein denaturation and exudation. Denaturation refers to the alteration of a protein’s structure, and exudation is the process where fluids leak out of the meat tissue. For instance, meat from animals that experienced stress before slaughter, or meat that has been improperly stored or handled, may exhibit higher albumin content in its purge (the liquid released from the meat). In these cases, the albumin is effectively being forced out of the muscle fibers.

The significance of albumin in meat quality assessment lies in its role as an indicator of protein damage and water-holding capacity. Meat with a high albumin content in its purge generally possesses a less desirable texture and lower nutritional value. From a historical perspective, the level of exudate, including albumin, has long been a qualitative indicator used by butchers and consumers to judge the freshness and overall grade of meat. Greater exudation has typically been viewed as a sign of poorer quality. Modern methods of meat processing, like tumbling and phosphate addition, are often employed to minimize purge loss and improve water-holding capacity, indirectly addressing the albumin issue.

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