If you have kids you have probably been exposed to the idea that more kids have food allergies these days. Well, the data seem to bear this out. There are several hypotheses about why this is so, but not a lot of data. Rather than engage in speculation, I’d like to wade back into the dangerous waters of real science and tell you a little about allergies. Perhaps after you’ve read my grossly oversimplified explication, you’ll come up with your own science-based hypothesis to explain increased childhood food allergies.
First, let’s talk about what isn’t going on. The Huffington Post, always a target-rich environment for woo-hunters, has a writer named Sloan Barnett. She is about as well-informed about health issues as Bill O’Reilly is about anger management. Two of her recent posts address child health, and both display a stunning level of ignorance. Her fetishization of “green” bears no relation to actual research on childhood health.
An example of her ignorance?
But what really stopped me in my tracks was that children with food allergies are two to four times as likely to have related conditions such as asthma or other allergies. And guess whose very own children have nut allergies AND asthma….
Um, yeah, Sloane. That’s because food allergies, asthma, and related conditions are, er, related! Asthma, allergy, and atopy are all a type of immune dysfunction known generally as type I hypersensitivity. Its determinants are partly genetic, partly environmental.
Despite many studies, no one knows why this [increase in allergy] is happening. Here’s what I know. My third child, who was raised in a non-toxic home, eating only organic formula and food, recently tested allergy free. Look, I can’t be certain that our new lifestyle is the reason this baby is allergy free, but it sure does make you think.
Actually, one of the most popular theories in scientific circles is the “hygiene hypothesis” which roughly states that our cleaner and more sterile environment exposes our kids to allergens later. If they had been exposed earlier, their immune systems may have developed a tolerance for common allergens. This hypothesis is based on observational studies that kids raised with pets, on farms and other “dirty” places have lower rates of environmental allergies.
Still, we don’t know why we have an increase in childhood allergies, and clearly, neither does Sloane. Her evidence is based on what she’s heard and her own experiences, which is worth bubkes.
Alright, let’s get to a little actual science.
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