Food Allergies – One in Five US Households Have Them By Truven Staff / Friday, August 5, 2011 The latest Thomson Reuters-NPR Health Poll reveals that one in five households have at least one member with a food allergy or intolerance. Interestingly food allergies are more prevalent among respondents under 35 years. Why do you think that is? In any case, the most common intolerance seems to be for milk and milk products. Find out what else people are intolerant to by reading the full story here.