Travel season is here, and for many of us, it brings the inevitable compromise: the trade-off between the excitement of a new destination and the high-risk environment of modern transit. In my practice, we don't just "hope" for health; we anticipate challenges and optimize our defenses. Travel is, by definition, a long-duration, high-exposure event. You are in a pressurized cabin or a crowded terminal, and despite rigorous hand hygiene or masking, you are inhaling the same recirculated air as...

My recent series on plastics worried a lot of you. I know, because you told me. The question: okay — so what do I actually do? Here's my answer: You don't need to overhaul your entire life this week. You need to start with one thing. And if you start with one thing, start with your water. Why water first You drink it every day. Your kids drink it every day. It is the single largest, most repeated exposure you have real control over — far more than the occasional plastic-wrapped meal. Fix your...

If you have not read Parts 1 , 2 , and 3 , I encourage you to do so before continuing. What follows will mean more if you understand what came before it. Part 1 was about what plastic is doing inside your body. Part 2 was about what you can do about it. Part 3 was the hardest thing I have ever written — a reckoning with what plastic is doing to our species, our fertility, and the generations that will follow us into a world we have permanently altered. I ended Part 3 with two words that I...