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In reply to the discussion: Modern wheat a "perfect, chronic poison," doctor says [View all]yellowcanine
(36,777 posts)Because that is how sensitivities can develop. There are many cases where people develop antibodies to something they had no problems with before. It doesn't mean that the protein causing the sensitivity changed. It can mean that the immune system in the person changed. Besides, the supposed change in wheat took place 40-50 years ago, so presumably the people were exposed to whatever is triggering the antibodies back when the blood was stored several decades ago. People's immune systems change as they age so that in itself could explain the data. There is also a possibility that the population where stored blood is available is not very representative of the population as a whole. Most people don't have stored blood. But people with chronic illnesses might.
As for the increase in sensitivity to gluten in the population overall, no surprise there, that is the case for almost every kind of sensitivity. Our ability to measure these sensitivities has vastly increased in recent years.