Our Allergy Book

Why should I study Cross-reactivity?

A leading allergy blogger explains how this could affect you.

Allergy and Cross- Reactivity by Sue Killian M.S. with John McMichael, Ph.D.

Michelle Berriedale-Johnson, Editor of FreeFrom Matters sites. takes a look.

     This is a very new branch of science about which relatively little is known – so Sue Killian's book is indeed 'a landmark project in that it may usher in an entirely new way of dealing with hypersensitivities of all sorts.

     Anyone who has an allergy or had had any dealings with allergy knows that it is a complicated and often totally baffling condition. The weirdest foods or environmental happenings appear to trigger reactions with no obvious logic and no apparent link. But maybe there is a link – we are simply not recognizing it?  That is what Sue Killian's book suggests.

     Allergens are made up of molecules. The same molecules may appear in many different members of a botanical family – and botanical families can be very broad and apparently disparate. Molecules are grouped according to their structure and molecules with similar structures will cross react. So why would a ragweed allergy sufferer react to melon, cucumber and bananas? Because they share molecules with similar structures.

     However logical this may seem, it opens up a positive ocean of extra complexity in an already complex subject. And because this is a relatively new concept, prior to Sue Killian's book, there has been very little research in this area. Which is why this book is such a vital and valuable addition to the literature on allergy.


     It is not just a book for clinicians, although it includes an impressive amount of science. It also a book that can work for the baffled allergy sufferer who has struggled to find help or understanding for their inexplicable reactions.

     Both doctors and patients need to become aware that an allergen is a molecule, and some of these molecules can be found in several plants, animals, or molds. The effects of these shared molecules may take you down an unanticipated road as they can produce unexpected symptoms. Knowledge of these cross-reactive molecules impacts medical therapies, patient allergen avoidance, landscapers, gardeners, and chefs.