We all know how important it is to take good care of our mental health. But did you know that your gut plays a bigger role in this than you might think? More and more scientific research points to a direct connection between the gut and the brain, known as the gut-brain axis. Probiotics play a surprisingly powerful role in this connection. In this article, discover how probiotics can support not only your digestion, but also your mood and mental resilience.
In this article, you will read:
- What probiotics are and their benefits for your health
- What the gut-brain axis is
- Why probiotics are important for your mental health
- What else contributes to good gut health
What are probiotics and why are they important?
Our bodies contain hundreds of billions of bacteria, which together are called the flora or microbiome. These bacteria can be divided into hundreds of different bacterial families, also known as strains. Each strain consists of a group of bacteria that performs a specific function within the body. Probiotics are live microorganisms that help improve the balance of bacteria in the body, especially in the intestines. In this way, they provide many health benefits for your body.
Health benefits of probiotics:
- Gut health: Probiotics help restore the gut flora after, for example, antibiotic use, and support regular bowel movements.
- Immune system: Probiotics can help support a balanced gut flora, which plays a role in the normal functioning of the immune system.
- Mental health: Scientific research suggests that the gut microbiome may be involved in mood and stress responses via the so-called gut-brain axis. Healthy gut flora can thus indirectly contribute to maintaining mental well-being.
- Digestion: Some strains help break down lactose or reduce bloating and flatulence.
- Skin and allergies: Research shows that probiotics can also contribute to calmer skin and regulate allergic reactions.
They occur naturally in fermented foods such as yoghurt, kefir, kimchi and sauerkraut, but are also available as supplements.
What is the gut-brain axis?
The gut-brain axis is the complex communication system between your gut and your brain. These two organs are in constant communication with each other via a network of nerves, such as the vagus nerve. The vagus nerve is a nerve pathway that directly connects your brain to your digestive tract. Hormonal signals and your immune system also contribute to this communication. What you eat, how you feel, and even how well you sleep can all be influenced by this interaction.
Your intestines are home to a huge population of bacteria, also known as the microbiome, which plays a key role in this process. They produce neurotransmitters, influence inflammatory processes and help regulate stress responses. For example, what many people don't know is that about 90% of serotonin (the “happiness hormone”) is produced in your gut. Healthy gut flora is therefore crucial for a stable mood and stress resistance. This makes the gut-brain axis an interesting and promising area of research, especially in the field of mental health.
What does science say?
In recent years, the number of studies on the role of probiotics in mental health has exploded.
A 2022 study containing a probiotic mixture of Lactobacillus helveticus, Bifidobacterium longum and Lactiplantibacillus plantarum showed that the probiotic influenced the brain's response to an emotional task in healthy subjects. After taking probiotics, different brain activity was observed in areas involved in emotions, thinking and facial recognition. In particular, the orbitofrontal cortex, which processes sensory information and is linked to emotional responses, showed increased activity, suggesting that such supplements may influence the processing of emotions.
A 2019 meta-analysis looked at 34 studies that examined whether prebiotics and probiotics can help with depression and anxiety. It showed that probiotics had a measurable positive effect on both depression and anxiety. The effect of probiotics was stronger in people who already had mental or physical complaints. Especially in people with a mental illness, such as depression, the effect even appeared to be moderate to large.
Another study investigated whether probiotics can help with sleep problems, stress and anxiety. There is growing evidence that the gut flora influences sleep quality, because the intestines produce substances that affect the brain, such as melatonin and GABA (sleep-promoting), or serotonin and cortisol (wake-promoting). Research is being conducted into the extent to which the composition of the gut flora is related to sleep quality and stress responses. A healthy gut flora can be a supporting factor in various bodily processes, including relaxation and sleep.
A systematic review from 2022 shows that people with depression have different gut flora than healthy people. Although the overall diversity of gut bacteria does not differ greatly, there are clear differences in composition (beta diversity) and in the presence of certain bacterial species. Treatments with probiotics and synbiotics (a combination of probiotics and prebiotics) showed a slight improvement in depressive symptoms after 4 to 9 weeks. Prebiotics alone did not have this effect.
These studies reinforce the idea that our intestines have a surprising amount of influence on how we feel mentally and even on the quality of our sleep.
Tips for using probiotics:
Want to reap the benefits of probiotics? Here are our tips:
Choose the right (scientifically proven) strains
Not all probiotics are the same. Their effectiveness depends on the bacterial strains used. Look for supplements that contain scientifically proven strains such as Weizmannia coagulans MTCC5856 or Bifidobacterium longum. These have been researched for their effects on stress, digestion and immunity, for example.
Be consistent in your use
Probiotics work best when taken daily. Try to take them at the same time of day, for example in the morning on an empty stomach or with breakfast. This reduces the chance of forgetting to take them and gives your intestines the opportunity to continuously benefit from their beneficial effects.
Combine with prebiotics
Prebiotics are dietary fibres that feed the good bacteria in your intestines. Think of fibre-rich foods such as vegetables, whole grains, bananas, garlic and legumes. Our probiotic supplements from VitaminFit combine probiotics and prebiotics, also known as synbiotics, for a powerful, mutual effect.
Curious about the difference with probiotics? Read our article Pre- and Probiotics: What is the difference and why do you need them?
Avoid “microbiome killers”
A healthy microbiome also requires a healthy lifestyle. Excessive consumption of sugar, alcohol, processed foods and unnecessary courses of antibiotics can seriously disrupt your intestinal flora. Prolonged stress also has a negative effect on the diversity of your intestinal bacteria. So try to find a balance, both in your diet and in your relaxation.
Look at the quality of your supplement
Go for a probiotic that is stable, contains prebiotics, has sufficient CFUs (number of live bacteria) and is free from sugars, artificial additives or fillers. Natural drop forms are ideal for people who have difficulty swallowing capsules or tablets.
Conclusion
Your mental health may well begin... in your gut. More and more research shows that your gut and brain are closely connected via the so-called gut-brain axis. By taking good care of your gut flora, you not only support your digestion, but also your mood, concentration, sleep and stress resistance.
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