Allergic reaction to the products of introduced gene products (the ‘foreign’ genes)  is one of the primary concerns about GMO’s.  It is a concern that is legitimate, but, like “unknown consequences” needs to be put into perspective of the non-GMO food we eat every day.

Fanatic Cook (among many others) has been writing about it.  Bix links to a very helpful monograph on the subject of allergenicity in GMO foods. Predicting allergic potential is difficult and an inaccurate process, at best.  All genes used in GMOs at least go through screening for potential allergenicity.  Compare this to the vast majority of other foods that are effectively only screened on people through trial and error through a long history of eating.

The main reason the use of GMO grains is not required to be listed on labels is that the grains are not any more likely to cause allergies (or any other adverse affect) than their  non-GMO counterparts.  Voluntary labelling such as “no-GMO” is allowed, which is something I applaud and support in the interest of freedom of choice and information.

I’ve been asked if eating meat from animals fed GMO grain means that we are eating the GMO proteins themselves?  Only to the extent that the particular modified protein passes through the digestive system wall.  In a healthy animal, most proteins are broken down before they are passed into the blood.  If this were a concern, we should be far more concerned that my pasture-raised cattle graze ragweed and other highly allergenic plants.