Case reports link HFCS to auto-immune reactivity and asthma. See fructositis.org to learn more. Also, please see our petition to the FDA to get HFCS out of our food. The site has a ton of links to the science of fructose and HFCS. Although it isn't medically recognized (we're working on raising awareness), scientists have confirmed the merits of the hypothesis on how the link may be possible. In those unable to absorb fructose it may modify dietary proteins and turn them into digestion resistant antigens that could travel to lung tissue and trigger symptoms.