Ultra-Processed Foods and Fertility: On Controlling What You Can Control

There's a specific kind of obsession that sets in after enough failed cycles — the kind where you start reading ingredient labels like they contain the answer. I know this because I lived there. Secondary infertility has a particular cruelty to it: you've done it before, your body knows how to do this, and yet. So you find the one thing you can actually control, which is everything you put in your mouth, and you grip it.

I worked with a registered dietitian. I cleaned up my diet in ways that felt both genuinely meaningful and slightly unhinged. I have opinions about gut health now. I became, briefly, a person who read studies for fun.

So when two new ones dropped this week linking ultra-processed foods to lower fertility — women with the highest intake were significantly less likely to conceive; men eating more UPFs took longer to get their partners pregnant — I felt the old reflex. Not guilt, exactly. More like, of course. One more variable to add to the list.

Worth noting: both studies are observational, meaning they show a link, not a cause. Researchers suspect it's not just poor nutrition, but chemicals like phthalates and BPA leaching from packaging (known hormone disruptors) doing damage in the background. According to the CDC, Americans get about 55% of their daily calories from ultra-processed foods, which is a lot of packaging.

Here's what I know, though: I did everything right, and it still took everything I had. The pantry audit matters. It also doesn't save you. Skippy was never leaving my house, and somehow, eventually, it worked anyway.