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Daily Dose

Breaking Bad Habits

1:15 to read

Do any of your children bite their nails or suck their thumbs? If so, are you always saying, “take your fingers out of your mouth, they are dirty”, or “if you keep biting your nails you will get sick due to all of those germs on your fingers”!  I was guilty of saying those very things to my own children, and I also remember being a nail biter and my mother saying the same thing to me.

Well, who would have thought that a study just released today in the journal Pediatrics might make us parents eat our own words (it wouldn’t be the first time).  The study, “Thumb-Sucking, Nail-Biting and Atopic Sensitization, Asthma and Hay Fever” suggests that “childhood exposure to microbial organisms reduces the risk of developing allergies”.  Who knew that there might be something so positive coming from a “bad habit”.  

This study was done in New Zealand and followed over 1,000 children born between 1972-1973 (dark ages) whose parents reported that they either bit their nails or sucked their thumbs at 5,7,9 and 11 years old. The participants were then checked at ages 13 and again at 32 years old to look for an allergic reaction ( by skin prick testing) against at least one common allergen.  And guess what…at 13 years of age the prevalence of an allergic reaction was lower among those children who HAD sucked their thumbs or bitten their nails.  Incredibly the the findings persisted almost 20 years later!  This study even looked at cofounding factors including sex, parental history of allergies, pet ownership, breast feeding and parental smoking… none of which played a role. 

So, while not advocating for children to suck their thumbs or bite their nails (which unfortunately I did until high school when I decided to have nails to polish) there may be a silver lining….a protective effect against allergies that persists into adulthood. 

Lemonade out of lemons!!!

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