Hey friends 👋🏽—today we’re diving into something super cool and super important: the gut-brain connection.
The gut and brain are constantly chatting, sending signals back and forth like text messages, using nerves, hormones, and even your immune system. This conversation is what we call the gut-brain axis, and it’s kind of like a superhighway running from your belly all the way up to your brain.
Your Second Brain? Meet Your Gut.
Did you know your gut has its own nervous system? It’s called the enteric nervous system, and it’s so smart, scientists consider it the “second brain.”
But here’s the thing—what you eat totally changes this conversation. Some foods help your gut and brain talk clearly, keeping you feeling calm and balanced. Other foods? Not so much. They stir up inflammation, throw your gut bacteria off balance, and can lead to foggy thinking, mood swings, or even anxiety.
Let’s break it down in easy-to-digest (see what I did there?) terms.
Your Gut Bacteria Run the Show
Inside your belly lives a whole universe of bacteria—trillions of them! And they’re not just hanging out. They help you:
Digest food
Absorb nutrients
Train your immune system
And believe it or not, they even affect your mood and stress levels
These tiny microbes can actually influence your neurotransmitters—those are the chemicals your brain uses to send messages. One example is galanin. Galanin helps regulate sleep, mood, and how your body handles stress. Too little of the good gut bacteria? That can throw galanin off and crank up your body’s stress response, triggering cortisol (aka your stress hormone).
Trouble in Gut Paradise: What Is Dysbiosis?
When your gut bacteria are in balance, everything hums along nicely. But when harmful bugs outnumber the helpful ones, it’s called gut dysbiosis. And that’s where the trouble starts.
Symptoms can look like:
Tummy issues (constipation, bloating, or diarrhea)
Moodiness or anxiety
Brain fog
Skin problems
Trouble focusing or sleeping
And guess what one of the main culprits is? The prevalent Standard American Diet (SAD), also known as the Western Diet. This way of eating is full of ultra-processed foods, sugar, unhealthy fats, and additives, and low in fiber and nutrients. It’s especially hard on kids’ growing guts and brains.
Heal Your Gut, Help Your Brain
The good news? You can start healing your gut-brain connection today—with food! Here are some simple swaps to keep your gut happy and your brain bright:
🥦 Add in colorful veggies – Think rainbow! Fiber from veggies feeds your good gut bugs.
🫐 Eat more fermented foods – Yogurt (dairy or non-dairy), sauerkraut, kimchi, and kefir are full of helpful probiotics.
🍠 Choose real, whole foods – The closer to the earth it looks, the better.
🌰 Include healthy fats – Like nuts, seeds, avocado, and olive oil. Your brain loves them.
🚫 Cut back on ultra-processed foods – Try to limit those boxed snacks, sugary cereals, and fast food. Sometimes it’s necessary but it should be our food staple.
💧 Drink water – Every cell in your body, including the ones in your gut, need hydration to do their job.
Mama Knows: Food is Medicine
I’ve seen this firsthand with my own keiki (kids). When we cleaned up our diets and cut back on processed foods we noticed a huge shift—not just in digestion, but in focus, mood, and sleep. Science backs this up, too. What you eat really does affect how you think and feel. So the next time your child (or you!) is having a tough day, it might be worth asking—what have I been feeding my gut?
Final Thoughts
The gut-brain connection is one of the most amazing discoveries in modern medicine. And it reminds us of something so simple, yet so powerful: Taking care of your gut means taking care of your whole self. Feed it with love, real food, and kindness—and you’ll feel the difference in your belly, your brain, and your day.
📚 References
Mayer EA, Knight R, Mazmanian SK, et al. Gut microbes and the brain: Paradigm shift in neuroscience. J Neurosci. 2014.
Berding K, Donovan SM. Diet can impact microbiota composition in children. Nutr Rev. 2018.
