Vaginal microbiome: what it is, what it's for and how to care for it
The vaginal microbiome is one of the most studied microbial ecosystems and, at the same time, one of the most unknown.
For decades, medical science treated the gut as a mere digestive tube. Today we know it's an intelligent organ, with its own nervous system, capable of producing more than 90 % of the human body's serotonin. And at the centre of this entire living ecosystem are two inseparable protagonists: probiotics and prebiotics.
“You don't just eat for yourself. You eat for the billions of microorganisms that live with you and for you.” |
Although they sound similar and are often confused, probiotics and prebiotics are very different concepts that complement each other masterfully.
Probiotics
They are live microorganisms – mainly bacteria and yeasts – which, when consumed in adequate amounts, provide a real benefit to the host's health.
They are literally new inhabitants settling in your gut, strengthening the intestinal barrier and competing with pathogens.
Prebiotics
These are non-digestible compounds – generally fermentable fibres such as inulin, FOS or GOS – which serve as a selective food source for beneficial bacteria already present.
They are the fertiliser for the microbial garden: they don't introduce new bacteria, but rather nourish the ones you already have.
The combination of both in the same product or food is called a symbiotic. A classic example is yogurt enriched with inulin: it includes the microorganism and its preferred fuel together in a single package.
Research into the gut microbiome has grown exponentially over the last fifteen years. These are the effects with the greatest scientific backing:
Strains such as Lactobacillus rhamnosus GG and Bifidobacterium longum have been shown in clinical trials to reduce the duration of infectious diarrhoea and improve symptoms of irritable bowel syndrome. Prebiotics such as FOS increase intestinal motility and promote regular bowel movements.
Over 70 % of the immune system is located in the gut-associated lymphoid tissue. A balanced microbiota trains the immune system to distinguish real threats from harmless molecules, reducing the low-grade chronic inflammation that underpins many modern diseases.
The vagus nerve acts as a bidirectional highway between the gut and the brain. Recent studies associate microbial diversity with lower levels of anxiety and depression, through the production of neurotransmitters such as GABA and serotonin itself.
Certain strains of Lactobacillus and Bifidobacterium influence sugar and fat metabolism, with the potential to improve insulin sensitivity and reduce obesity-associated inflammation.
Characteristic | Probiotics | Prebiotics |
|---|---|---|
Nature | Living microorganisms | Indigestible plant fibres |
Function | They colonise and balance the gut flora | They feed the existing beneficial flora |
Fragility | Sensitive to heat and gastric acidity | Heat and cooking stable |
Sources | Fermented foods (kefir, yogurt, kimchi) | Fruit, vegetables, pulses, cereals |
Effect on time | Days to weeks | Weeks to months |
Gastric resistance | Variable depending on the strain | High (not digested in the small intestine) |
Before resorting to supplements, nature already offers us extraordinarily rich sources. Fermentation has been a food preservation technique for millennia, and it turns out it's also a natural pharmacy.
There's no need for a revolution in your diet. With small, sustained changes over time, you can profoundly transform the health of your microbiome:
The probiotic supplement market is worth billions of euros a year, but not all products are created equal. Some points to consider:
The strains matter. Not all probiotics do the same thing. Scientific evidence is strain-specific; Lactobacillus acidophilus NCFM can help with lactose intolerance, but not necessarily with another digestive issue.
The amount also counts. Quality products indicate the CFUs (Colony Forming Units) per dose. Most clinical studies use between 1,000 and 100 billion CFUs.
Survival is key. Probiotics must arrive alive in the large intestine. Look for products with enteric coating or microencapsulation technology if your aim is for them to colonise the colon.
Probiotics and prebiotics are not a passing fad. They are the result of decades of research that has revealed something astonishing: we are not isolated individuals, but living ecosystems in constant dialogue with trillions of microorganisms.
Looking after your microbiome with fermented foods, diverse fibre, and a balanced lifestyle is one of the most profitable investments you can make in your long-term health.
Your gut will thank you. And with it, your mind and your immune system will too.
The vaginal microbiome is one of the most studied microbial ecosystems and, at the same time, one of the most unknown.
The gut microbiota is one of the most searched topics on Google in recent years, and rightly so.