Among adults, national surveys have found that there has been no recent increase in the population geometric mean total IgE (45 in men and 30 in women in 1995–6 and 42 in men and 27 in women in 2001).Why allergies increasing among children, but not adults? It isn't like the children don't generally grow up to be adults.
Monday, June 30, 2014
Are Allergies Increasing?
My first reaction was, "Probably not. More like increasingly neurotic parents turning little things into disasters." But to my surprise, a number of studies do show that various types of allergic reactions are on the rise in Western nations. This study shows an 18% increase in food allergies among under 18s in the U.S. from 1997 to 2007. This study, while showing no increase in Switzerland adolescents after 1992, indicates that there was a definite increase before then. Similarly, this study of German children showed a large increase in the latter half of the 20th century, but nothing since the start of the new century. This study of a variety of allergic reactions in British children shows a noticeable increase in many forms of allergies, although perhaps decline in the last few years. What was especially startling, however, was this: