I’m bringing you the first episode of a series I’m doing called “Just Keep Swimming.” It’s a Non-Toxic miniseries about male infertility and chemical exposure, exploring how chemicals in our environment (or chemicals we choose to inject into our bodies) can have an enormous impact on our individual health and even the future of humanity.

This episode is a conversation that I had with the Dutch looksmaxxer, Felix van der Heiden, when I was visiting the offices of the biotech startup, Sperm Racing. For the full story there, you can read my article in The New York Times Magazine about the week I spent with those boys. Felix, I thought, was a super interesting character, and he shows up in the piece, but I didn't really get to go as deep in the article as I wanted to. I had some amazing tape that just was sitting around, and I thought, “People need to really hear his full story.”

What follows is a selection from the scene when Felix first looked at his sperm under a microscope with his friend Manu, and then a conversation that Felix and I had afterwards, where he talks to me a bit about the different enhancements that he’s using and his thoughts about the effects on his fertility and why he’s decided to pursue chemical enhancement at such a young age. I think you’ll enjoy it.

A fifth of the world’s oil flows through the Strait of Hormuz, a sliver of ocean between Iran and the Gulf States. Since the beginning of the US Israeli war in Iran, that traffic has slowed to a trickle, which has sent the price of oil skyward. Countries around the world are doing everything they can to accelerate the transition because whether they care about the climate crisis or not, they recognize that there is no choke point on the sun.

In this episode of Non-Toxic, I’m joined by fitness influencer Colin Davis to explore the intersection of muscle hypertrophy, masculinity, and climate activism. You might remember Colin from the Carbon Bros finale, but a brief cameo didn’t do him justice—so we’re diving into the full, extended conversation here.

Colin is breaking the mold by proving bodybuilding isn’t just for the right wing. He argues that to reach men today, the left needs to meet them in their own digital spaces and speak their language. We get into the surprising links between empathy and physical strength, while Colin deconstructs some of my own biases about gym culture. It’s a wide-ranging, candid conversation that feels like a long-overdue hang.

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