Why Stress Is Wrecking Your Digestion (Even If You Think You're Handling It Fine)
- Katie Barngrover
- Jul 13
- 2 min read
If you've been eating well, taking your supplements, doing everything you know to do — and your digestion still feels off — stress might be the missing piece. Not the obvious, "I'm having a breakdown" kind of stress. The quiet, everyday, always-on kind that most of us don't even register as stress anymore. Here's the actual mechanism behind why it matters.
Your body runs on a kind of internal switch. One setting is "fight or flight" — alert, ready, mobilized. The other is "rest and digest" — calm, settled, focused on things like breaking down food and absorbing nutrients.
Here's the problem: your body can really only be in one of those settings at a time. And cortisol — your main stress hormone — is the switch that flips you toward "fight or flight."
Cortisol's job is to wake you up and get glucose into your bloodstream fast. That's it. That's the whole point of cortisol — mobilize energy, stay alert, handle the threat. It doesn't care whether the "threat" is an actual emergency or just a full inbox and a long to-do list. The body responds the same way either way.
And when cortisol is chronically elevated — which, if we're honest, describes most of our lives most of the time — your body stays tilted toward "alert and mobilized" and away from "rest and digest." Stomach acid production, which needs that calmer state to function well, gets deprioritized. Less acid means food doesn't break down the way it should. Which means the nutrients you're working so hard to eat well aren't being absorbed the way you'd hope.
So if you've been doing "everything right" — eating well, taking your supplements — and still feel like none of it is working? Chronic stress might be a quiet reason why.
This is actually part of why a simple pause before eating matters more than it seems. Taking even thirty seconds before a meal — to sit, breathe, look at your food — isn't just a nice ritual. It's a signal to your nervous system to shift out of "alert" mode, even briefly. You can't fully flip the switch in thirty seconds, but you can nudge it in the right direction, meal by meal.
Small related note: high stress also tends to shift people toward shorter, shallower breathing. That alone reduces how much oxygen — and ironically, moisture — your body has to work with. Worth noticing the next time you feel wound up.
If this resonates and you want to understand what's actually driving your fatigue, bloating, and digestion issues, my free MasterClass walks through exactly this.

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