Chief Medical Editor for NBC News Dr. Nancy Snyderman explained why people have so many allergies these days when she joined me on Mondays With Marlo. The reigning hypothesis is the "hygiene hypothesis," which basically says that our environments are too clean. This leads our immune systems to over-regulate and unfortunately, produce an allergic reaction.
Click here for the full interview.
For more tips on optimizing your health, see Dr. Snyderman's healthy living tips:
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