8 Ways To Reset Your Gut Microbiome Naturally (And Support Immunity)

In our clinic, I rarely see gut issues in isolation anymore. They tend to arrive alongside fatigue, low mood, skin flare-ups, or that vague sense of "something just isn't right." And more often than not, when we gently support the gut, everything else begins to shift too.

Your gut isn’t just digesting food — it’s interpreting your entire lifestyle.

The gut microbiome — the community of bacteria living in your digestive system — plays a central role in immune function, mental health, and metabolism.¹ When it's balanced, you tend to feel clear, energised, and resilient. When it's not… things can feel quite different.

Key Takeaways

• Your gut microbiome influences immunity, mood, metabolism, and cravings more than most people realise.
• Stress, sugar, processed foods, and certain medications can disrupt microbial balance.
• Fibre, fermented foods, and mindful eating habits help rebuild a resilient gut environment.
• Supporting the gut lining and nervous system is just as important as what you eat.
• Small, consistent changes often work better than extreme "all-or-nothing" resets.

Let's walk through eight ways I guide clients (and honestly, myself) back toward a healthier internal ecosystem.

1. Remove Items That Weaken Your Gut Microbiome

Before adding anything in, I always start here because you can't rebuild a rainforest if something is still clearing it.

Antibiotics, excess sugar, ultra-processed foods, and artificial sweeteners can disrupt microbial balance.² They don't just affect "bad" bacteria — they often wipe out beneficial strains too.

I also see issues linked to environmental exposures — things like pesticide residues or highly treated water. It's not about becoming obsessive, but reducing the overall load where you can.

And a gentle reality check: sometimes these things are necessary (like antibiotics). The goal isn't perfection — it's recovery and support afterwards.

2. Increase Your Daily Fibre

Fibre is one of the simplest — and most overlooked — ways to support your microbiome. It acts as a prebiotic, meaning it feeds your beneficial bacteria.³

When fibre intake is too low, I often see sluggish digestion, bloating, and unstable energy. When it improves, things tend to regulate quite quickly.

Foods I regularly recommend include chia seeds, flax, leafy greens, berries, legumes, and cruciferous vegetables. If needed, I'll layer in something like Rejuv Digestive Complex Powder to make this easier and more consistent.

Personally, this is one I still have to stay mindful of — if I get busy and my greens drop off, I notice it within days.

3. Cut Sugar to Reset Your Gut Microbiome

This is where things can feel a bit confronting.

Sugar tends to feed less desirable microbes, which can then drive more cravings — a loop I see all the time.⁴ It's not just about willpower; it's biology.

That said, it's not about never eating chocolate again. It's about shifting the overall pattern. I often encourage clients to stabilise meals first — protein, fibre, healthy fats — so those intense sugar swings naturally soften.

4. Try Intermittent Fasting

Giving your digestive system a break can be surprisingly powerful.

Simple approaches, such as a 12–16-hour overnight fast, can support gut repair and reduce inflammation.⁵ It doesn't need to be extreme to be effective.

In practice, this might look like finishing dinner earlier or delaying breakfast slightly. For some clients, I pair this with a greens powder such as Rejuv Super Greens Powder to maintain nutrient intake while easing digestive load.

And if fasting feels stressful for your body, that's a sign to adjust — not push harder.

5. Increase Fermented Foods & Probiotics

Fermented foods like kefir, sauerkraut, and kimchi can help introduce beneficial bacteria into the gut.⁶

But here's the nuance: not everyone tolerates them straight away. If someone has significant bloating or histamine sensitivity, I'll often start more gently — sometimes with targeted probiotics first.

It's less about forcing the "perfect" foods and more about meeting your gut where it is.

6. Clear Parasites To Reset Your Microbiome

This is one of those areas that's often overlooked — or misunderstood.

In some cases, underlying infections or imbalances (including parasites or fungal overgrowth) can contribute to ongoing gut and mood symptoms.⁷ I've seen this more times than I can count over the years.

That said, I don't recommend aggressively self-diagnosing. Testing and guidance matter here.

When appropriate, I may use targeted support, such as Rejuv Para Cleanse or Rejuv Candida Gone Capsules, alongside broader gut–brain support strategies.

7. Strengthen Your Mucosal Barrier

The gut lining — sometimes called the mucosal barrier — acts as both a home for beneficial bacteria and a protective shield.⁸

When this barrier is compromised, we can see increased inflammation, sensitivities, and immune disruption.

Nutrients like L-glutamine, along with foods such as bone broth or aloe vera, can help support repair. I often include Rejuv L-Glutamine Powder in protocols where the gut lining needs extra care.

This is one of those quiet foundations — not flashy, but incredibly important.

8. Boost Your Good Environmental Bacteria

We weren't designed to live in completely sterile environments.

Exposure to nature — soil, plants, animals — helps diversify the microbiome.⁹ Even small things like gardening, walking barefoot on the grass, or spending time outdoors can make a difference.

I keep plants throughout my home for this reason (and yes, my peace lilies have survived years of neglect and overwatering — which feels like a small miracle).

Make Your Microbiome a Healthy Internal 'Rainforest.'

When you zoom out, gut health isn't about a single supplement or strict protocol. It's a pattern.

It's how you eat, how you manage stress, how well you sleep, and how supported your nervous system feels day to day. The gut–brain axis — the communication pathway between your gut and mind — plays a huge role here, linking emotional stress directly to digestive function.¹⁰

You don't need to do everything at once. Start with one or two shifts, let them settle, and build from there.

A Gentle Next Step

If you're reading this and recognising a few patterns — the sugar cravings, the bloating, the stress-eating — you're not alone. These patterns are incredibly common and can change with the right support.

You don't need to guess your way through it. If you'd like a clearer picture of what your body might be asking for, you can complete the Rejuv Wellness Profile here. It's a simple, supportive place to start.

Think of it less as "fixing" something — and more as learning how to work with your body again.