The microbiome is the community of beneficial bacteria that live in and on us—most of them making their home in the gastrointestinal tract. Ew…bugs! Very Halloween. But not all bugs are bad—in fact, these “good bugs” are essential to our health.
Our gut bacteria help train and regulate the immune system. About 70% of our immune tissue is in the gut, in something called GALT (gut-associated lymphoid tissue). Think of GALT as the body’s built-in surveillance system, keeping an eye out for invaders, preventing pathogen overgrowth, and regulating immune balance.
These microbes also synthesize vitamins (like B vitamins and vitamin K), produce neurotransmitters such as serotonin and GABA, support energy production, and even help us eliminate toxins. When the microbiome gets disrupted (a state called dysbiosis), it’s linked to a wide range of problems—metabolic disease, autoimmune issues, inflammation, and even mood disorders.
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How to Heal Your Gut
So clearly, keeping a healthy microbiome matters. One of the most powerful ways we do that is through the food we eat.
What helps build a thriving microbiome?
- Fiber-rich fruits and vegetables: asparagus, artichokes, kale, broccoli, Brussels sprouts, leeks, apples, pears, berries.
- Beans and legumes: lentils, black beans, chickpeas.
- Resistant starches (they escape digestion and feed beneficial bacteria): green bananas, cooked-and-cooled potatoes or rice, oats, lentils, even shirataki noodles.
- Prebiotic foods (keep the good bacteria thriving): onions, garlic, chicory root, Jerusalem artichokes, dandelion greens.
- Probiotic foods (contain live bacteria): yogurt, kefir, kimchi, sauerkraut, miso, kombucha.
- Polyphenol-rich foods (bonus fuel for your microbes): green tea, dark chocolate, red grapes, olive oil.
Bottom line? A colorful, diverse diet = a diverse microbiome. And a diverse microbiome = stronger immunity, better metabolism, and more resilience overall.
1. The Gut is Your “Second Brain”
Your gut is sometimes called your “second brain” because it has its own nervous system called the enteric nervous system (ENS). It has around 100 million neurons, which is more than the spinal cord! That’s why your gut can send signals to your brain, making it the reason behind those “gut feelings.”
2. Your Gut Houses Trillions of Microorganisms
There are about 100 trillion bacteria, fungi, and viruses living in your gut! That’s about 10 times the number of cells in your body. And guess what? They play a huge role in your health—digesting food, protecting you from bad bugs, and even influencing your mood.
3. Gut Bacteria Have Their Own Preferences
Gut microbes love variety! The more diverse your diet (especially when it comes to plant-based foods), the happier your gut will be. A diet rich in fruits, vegetables, whole grains, and legumes helps promote a diverse microbiome.
4. The Gut-Immune Connection
Did you know about 70% of your immune system is housed in your gut? That’s why gut health is closely tied to your body’s ability to fight off illness. A balanced microbiome can help regulate immune responses, while an imbalanced one might contribute to autoimmune conditions.
5. Your Gut Influences Your Mood
If you’ve ever felt “butterflies” in your stomach before a big event, you’ve felt the gut-brain connection in action. Serotonin, the “feel-good” neurotransmitter, is primarily produced in the gut. So a happy gut often means a happier you!
How to Improve Gut Health
Exercise is like a love letter to your gut, helping it stay healthy and strong. Moving your body regularly improves digestion, keeps things moving smoothly, and reduces bloating and constipation. It also helps balance your gut bacteria. Consistent, moderate exercise encourages more of the “good” microbes that support digestion, lower inflammation, and boost immunity.
How Exercise Reduces Stress and Supports Digestion
Exercise also eases stress, one of the biggest disruptors of gut health, by lowering cortisol and activating the body’s relaxation system so your gut can work better. On top of that, it improves circulation and oxygen flow, giving your digestive organs and microbiome the fuel they need to thrive.
The Best Types of Exercise for Gut Health
For a happier gut, mix in gentle daily movement like walking, yoga, or Pilates, strength training to build muscle and regulate blood sugar, aerobic exercise such as walking, cycling, or swimming to improve gut diversity; and mind-body practices like stretching, breathwork, or tai chi to calm stress and support the gut-brain connection.
Consistency Matters More Than Intensity
Most of all, your gut benefits from consistency, not intensity. By moving daily, eating whole foods, and taking time to breathe deeply, you can boost your energy, mood, and digestion-and fall back in love with the gut that’s been loving you all along.
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This content is for educational purposes only and not a substitute for personalized medical advice. Please consult your clinician before starting supplements.
