The Gut–Brain Connection: Why Fermented Foods Are a Game Changer
- Gillian Scerri

- Oct 24
- 4 min read
Anxiety and depression rates are at an all-time high! The World Health Organization has even called it a global mental health crisis.
But what few people realize is that one of the simplest ways to support your mood and mental health isn’t another pill, it’s improving your gut health.
Around 90% of your serotonin, your body’s “feel-good” hormone, is actually produced in your gut. So if your gut isn’t happy, your brain won’t be either.
The good news? You can start improving your gut health in as little as three days and all it takes is a forkful of one simple food a day: fermented foods.
👉 Prefer watching instead of reading? Check out my full YouTube video here:
🌿 Why Gut Health Matters
If you often feel bloated, sluggish, or “off” in your mood, you’re not alone. Many people live with gut discomfort for years, thinking it’s normal.
But it’s not. I did the same for a long time until I started working on my gut health. Once I did, I noticed huge changes in my energy, digestion, and even my mindset.
The biggest culprit for poor gut health? Sugar and processed foods. They feed bad bacteria and create inflammation in the body.
To feel your best, it’s not just about cutting those out, it’s about healing and rebuilding your gut with beneficial bacteria.
And fermented foods are one of the easiest, most natural ways to do that.
🧫 How Fermented Foods Support Your Brain and Mood
Fermented foods are packed with live beneficial bacteria, also known as probiotics, that help your microbiome thrive.
A diverse gut microbiome is linked to:
✅ Better digestion
✅ Reduced inflammation
✅ Stronger immunity
✅ Improved mood and mental clarity
What you eat directly affects how you feel. A balanced microbiome, meaning lots of good bacteria, has been shown to reduce anxiety, depression, and stress levels.
Even better? Your gut can begin to heal in as little as three days, and just one forkful of fermented food daily can start to make a difference.
🧺 A Little History: Ancient Wisdom for Modern Health
Fermentation is nothing new, it’s an ancient preservation method that dates back thousands of years, long before fridges existed.
People used salt or vinegar to preserve vegetables for months, and along the way, they discovered an unexpected benefit: those foods started producing beneficial bacteria, turning them into natural probiotics.
🍽️ The Best Fermented Foods to Add to Your Diet
Adding fermented foods into your meals is simple, affordable, and surprisingly delicious.
Here are a few great options:
🥣 Plain yogurt or kefir — Choose ones with live cultures. Enjoy them as a snack or stir them into oats or curries.
🥤 Kombucha — Pick a low-sugar version. It’s a refreshing, fizzy alternative to alcohol, which can damage your gut.
🥬 Sauerkraut or kimchi — Just one forkful a day with your lunch or dinner can help repopulate your gut with beneficial bacteria.
🍲 Miso — Try it as a soup starter, or use it instead of stock in curries, stir-fries, or soups. It adds a beautiful, rich umami flavor.
🍢 Tempeh — A great source of plant-based protein and probiotics. I love grilling it on my meat-free days.
💡 Tip: For best results, mix and match. Each fermented food contains different strains of beneficial bacteria and variety is key to a healthy gut.
🛒 When buying fermented foods, look for “raw,” “unpasteurized,” or “live cultures” on the label. That’s how you know they still contain the good bacteria your body needs.
⚠️ A Few Things to Keep in Mind
If you’ve taken antibiotics or daily medications, your gut bacteria may be depleted so fermented foods can help restore that balance.
If you have candida overgrowth, go slowly. Some fermented foods can make symptoms worse until your gut is rebalanced, so check with a practitioner before diving in.
Fermented foods are powerful, but they’re just one piece of the puzzle.
Gut health improves through variety... different foods, habits, and lifestyle changes all play a role.
Another simple way to support your gut is by adding three specific seeds to your diet. I share exactly how to do that in this video.
Remember: your gut and brain are constantly communicating. When you nourish one, you heal the other.
Next time you’re at the supermarket, grab a jar of kimchi or sauerkraut, or better yet, make your own at home for a fraction of the price.
You can find a free, simple sauerkraut recipe here to help you get started.
Healing your gut doesn’t have to be complicated. It starts with small, daily choices and one forkful of fermented food at a time.
✨ Remember: it’s not about perfection, it’s about small, consistent changes.
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