This contains all of the first year's chronicles and more. Allergies and food intolerances cannot be controlled or managed through diet. When our immune system is challenged it can either take the immune pathway where it will destroy the invader, or take the allergic pathway, which is a bit like involving the whole neighbourhood in a petty household squabble.
Allergens can behave in much the same way as pirates invading a ship.
If our immune system decides to take the allergic pathway, a number of events occur. Following the first exposure to an allergen, a class of antibody called IgE is produced, its structure resembling a multi-pointed star. The target of these sharp projections is a class of cell whose role it is generally, to act as a mediator of hypersensitive reactions. We call them mast cells, identical in name to the mast on a ship. At this stage, that is about all that happens.