Here's help to kill that craving.
Main function seems to be to protect the host against invading parasites.
While parasitic disease may not be a major clinical issue in most industrialized nations, it is a major public health problem in developing nations. The antigen-specific IgE interacts with mast cells and eosinophils to protect the host against the invading parasite. However, the same antibody-cell combination is also responsible for typical allergy or immediate hypersensitivity reactions such as hay fever , asthma , hives and anaphylaxis . One, a high affinity receptor, is found primarily on mast cells and basophils . The other is a low affinity receptor found on CD23 cells.