Estimates of the prevalence of<unk>  vary widely from 2% to over 20% of the population. So far only three prevalence studies in Dutch and English adults have been based on double-blind, placebo-controlled<unk>  challenges. The reported prevalences of<unk>  allergy/intolerance (by questionnaires) were 12% to 19%, whereas the confirmed prevalences varied from 0.8% to 2.4%. For<unk>  to<unk>  additives the prevalence varied between 0.01 and 0.23%.<unk>  rates were found to be similar in the population in Norway. Out of 4,622 subjects with adequately<unk> lled-in questionnaires, 84 were included in the study (1.8%) Perceived<unk>  is a common problem with significant nutritional consequences in a population with IBS. Of these 59 (70%) had symptoms related to intake of<unk> , 62% limited or excluded<unk>  items from the diet. Tests were performed for<unk>  allergy and malabsorption, but not for<unk> . There were no associations between the tests for<unk>  allergy and malabsorption and perceived<unk> , among those with IBS. Perceived<unk>  was unrelated to musculoskeletal pain and mood disorders. According to the RACP working group, "Though not considered a "cause" of CFS, some patients with chronic fatigue report<unk> s that can exacerbate symptoms."
Food intolerance
Food allergy
Dysphagia
Allergy
Aphagia
Allergies in children
Steatorrhea
Food addiction