Food Allergies are Increasing
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1 in 13 children has food allergies.
Food allergies have increased by 50% over the last 15 years. Why? There’s no clear answer for this. The Hygiene Hypothesis explains how allergies, in general, occur more in developed countries. The antibody for fighting of parasitic infections is the same one involved in allergies. With public health measures that prevent infectious diseases in developed countries, immune cells skew to start fighting allergens instead. Prior recommendations, which were only relatively recently changed, used to recommend waiting to introduce allergenic foods to children until after age 2. We now find that, without risk factors, it is better to introduce allergenic foods early - like around 6 months - after regular table food has been introduced. The delay in introduction for those years may contribute to the increase in allergies. There are likely many other factors, like environment, that we just don’t know about yet.