Being on the road this week in LA visiting my two nephews and filming a podcast was the perfect reminder of how critical it is to stick to the fundamentals—especially when you’re away from your usual routine. So for this edition of Mark’s Must-Haves, I’m sharing my travel essentials—the things I never leave home without to support my oral and systemic health while traveling. 1) MagnesiumLet’s start with the MVP: magnesium. Travel can throw off your sleep, your gut, and—believe it or not—even your teeth. I tend toward sensitive teeth, and magnesium is something I never skip a day on.Magnesiu...

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