In cases of imbalanced gut microbiota ("dysbiosis"), shifts in the predominant bacteria can be observed. Insufficient fiber, high sugar intake, chronic stress, antibiotics, and alcohol consumption can trigger this. The consequences are broader than one might think:

• Reduced SCFA production— fewer beneficial signals to the brain.
• Increased intestinal permeability ("leaky gut")— inflammation-promoting substances leak into the bloodstream.
• Elevated inflammatory signals — chronic low-grade inflammation often correlates with fatigue, low mood, and "brain fog." 
• Disrupted neurotransmitter balance— less serotonin, GABA, and dopamine precursors.

What often arises in practice: people with disrupted gut flora not only report digestive issues but also mood swings, low energy, poorer focus, and worse sleep. The gut-brain axis is not a one-way street — restoring balance on one side often supports the other as well.

1. Eat for your gut flora 

A varied, fiber-rich diet is the foundation. Aim for 30 different plant-based products per week (vegetables, fruits, legumes, grains, nuts, seeds, herbs). The diversity of fibers feeds a diversity of bacterial strains — and diversity is an important marker of healthy gut flora.

2. Add fermented products 

Yogurt, kefir, sauerkraut, kimchi, miso, tempeh, and kombucha contain live bacteria that can supplement your gut flora. Start gradually if you're not used to them yet — too large a portion at once can initially cause more flatulence.

3. Support with probiotics where necessary 

During periods of stress, after antibiotics, after a holiday with traveler's diarrhea, or with chronic complaints, probiotic supplements can help restore balance more quickly. For a more detailed explanation of when to choose pre- or probiotics: see our July blog #3 (Fibers, prebiotics, and probiotics).

4. Limit gut-stressors 

Refined sugars, ultra-processed foods, excessive alcohol, chronic stress, and unregulated antibiotic use are the biggest disruptors. Total avoidance is not necessary, but a more conscious approach is beneficial for your gut flora and your mental state.

5. Ensure good sleep and exercise 

Your gut flora also has its own circadian rhythm — poor sleep disrupts it. Regular exercise (especially walking) promotes diversity. Both work through the gut-brain axis to affect your mood and energy.

Your gut and your brain form one cooperative system — what's good for one almost always helps the other. A varied, fiber-rich diet, fermented foods, sufficient sleep, exercise, and stress management form the foundation. Probiotics are a useful supplement, especially during periods of extra gut strain (stress, after antibiotics, after travel). And conversely: supporting stress and mood through mindfulness, exercise, or targeted supplements (see the June blogs on energy and magnesium) also helps your gut.

Disclaimer: This article is for informational purposes only and does not replace medical advice. A dietary supplement is not a substitute for a varied and balanced diet and a healthy lifestyle. If in doubt or taking medication: consult a doctor or pharmacist. Do not exceed the recommended daily dosage. Keep out of reach of young children.