Microbiome Update: Are You Feeding the Good Guys?

Let me ask you something. When you sit down to eat, who are you feeding?

Yourself, obviously. But also — the trillions of microorganisms living in your gut. Your microbiome. And here's the thing: what you choose to eat doesn't just affect you. It affects every single one of them. And they, in turn, affect almost everything about how you feel.

I think about this every time I open a jar of sauerkraut. I'm not just eating vegetables. I'm feeding my gut garden.

What is the microbiome, really?

Your gut microbiome is the vast community of bacteria, fungi, viruses, and other microorganisms that live in your digestive tract — primarily in your large intestine. There are approximately 100 trillion of them, representing thousands of different species. They collectively weigh about 1.5 kilograms. They have their own genes — in fact, the microbial genes in your body outnumber your human genes by about 150 to 1.

You are, in the most literal sense, more microbe than human. And that's not a scary thought — it's a fascinating one. Because it means that taking care of your microbiome is one of the most important things you can do for your health.

The good guys vs. the bad guys

Not all gut bacteria are created equal. Some are beneficial — they help digest food, produce vitamins, regulate the immune system, and protect against harmful pathogens. Others are opportunistic — harmless in small numbers, but capable of causing problems if they overgrow.

The balance between these two groups is everything. A diverse, thriving population of beneficial bacteria keeps the opportunistic ones in check. But when that balance tips — through poor diet, stress, antibiotics, illness — the bad guys get a foothold. This is called dysbiosis, and it's linked to everything from bloating and IBS to anxiety, autoimmune conditions, and chronic inflammation.

What the good guys eat

Beneficial gut bacteria thrive on two things: probiotics and prebiotics.

Probiotics are live beneficial bacteria — found in fermented foods like sauerkraut, kimchi, kombucha, kefir, and yoghurt. When you eat these foods, you're directly introducing new beneficial bacteria into your gut.

Prebiotics are the fibre that feeds your existing gut bacteria — found in vegetables, legumes, whole grains, garlic, onions, and leeks. Fermented vegetables give you both at once: the live cultures and the fibre they need to thrive. It's a complete package.

What the bad guys eat

Ultra-processed foods. Refined sugar. Artificial sweeteners (yes, even the "healthy" ones — research suggests they disrupt the microbiome significantly). Excess alcohol. A diet low in fibre and variety.

The modern Western diet is, unfortunately, almost perfectly designed to feed the wrong bacteria. Which is why so many people are struggling with gut issues, inflammation, and the chronic conditions that follow.

Simple ways to feed the good guys

• Eat a tablespoon of raw fermented vegetables with at least one meal a day
• Aim for 30 different plant foods per week (more variety = more microbial diversity)
• Include prebiotic-rich foods: garlic, onions, leeks, asparagus, bananas, oats
• Drink kombucha or kefir regularly
• Reduce ultra-processed foods and refined sugar where you can
• Manage stress — the gut-brain connection is real, and chronic stress directly harms the microbiome

You don't have to do all of this at once. Pick one thing. Start there. Consistency over perfection, always.

The update your microbiome needs

Think of this as a software update for your gut. The good news is that the microbiome is remarkably responsive — studies show meaningful changes in gut bacteria composition within just a few days of dietary changes. You can start shifting things today.

A jar of sauerkraut is a pretty good place to begin.

Browse our range of raw, living fermented vegetables at Fermentastic — and start feeding the good guys. 🦠