Lactalbumin alpha Ab.IgE

This test detects IgE antibodies against alpha-lactalbumin, a major milk protein found in cow and some other mammalian milks. Unlike casein (the other main milk protein), alpha-lactalbumin is heat-sensitive and denatures during pasteurization, though some individuals remain allergic. A positive result indicates IgE-mediated milk allergy with sensitization to this specific protein. This test helps distinguish which milk proteins trigger allergic reactions and guides dairy avoidance and product selection.