If you live almost anywhere in the continental U.S. and Canada, you’re in for some chilly weather for the next 10 days at least, so it’s time to boost your immune system for the cold and flu season. Let’s start where your immune system starts and that’s your gut. You guessed it—we’re talking about the microbiome, the 100 trillion or so microbial organisms that live in and on our bodies and contribute to our health.

There are three ways to give your microbiome a boost:

• Eat more raw vegetables and fruits . . .
  

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