In my last post I mentioned "the Big 8" allergies.  These are the typical causes of most IgE (Immunoglobin E) allergic reactions.  Food Sensitivities are more subtle and delayed allergic reactions involving IgG, or so the theory goes.  Yes, that's right, it's still a theory.

IgG food allergies - are they real? talks about some of the evidence to support Food Sensitivities and the accuracy of the IgG ELISA blood testing.

I personally did the ELISA test and now avoid certain foods.  I also do a pretty strict 4-day rotation diet.  Is it helping with my symptoms?  I can't say for certain.  However, at least I am eating healthier than before.  That's a plus.