The Science of Rebiosis
Rebiosis is the natural process of restoring a depleted gut ecosystem to a state of balance and resilience.
Your Body Is a Superorganism
of the immune system housed in the gut
of the body's serotonin produced in the gut
microbial generation time vs. 25 years for human cells
You probably already know the basics: the gut microbiome is important. But the full picture is more remarkable than most people realise.
Your gut houses over 80% of your immune system. It produces 90-95% of your body's serotonin. And the combined genetic repertoire of your microbial community exceeds the human genome by orders of magnitude.
Scientists now describe the human body as a "superorganism," or holobiont: not an isolated biological entity, but a functional unit where human cells and microbial communities work as one. Over millions of years of evolution, the body effectively outsourced critical life functions to these microbial partners. Digestion. Vitamin synthesis. Immune calibration. The reason is elegant: microbial generations turn over every 18-20 minutes, allowing them to adapt millions of times faster than human cells can (which take roughly 25 years per generation).
"We didn't just develop alongside microbes. We developed because of them."
What Modern Life Has Stripped Away
estimated proportion of the human diet that was once fermented foods
what most modern diets contain today
Modern food processing has systematically removed the microbial diversity humans co-evolved with. Pasteurisation, irradiation, preservatives, chlorinated water, and soil depletion have all played a role.
Fermented foods once made up an estimated 30-40% of the human diet. Today, most people consume close to zero. The result is dysbiosis: reduced microbial diversity, weakened barrier function, and downstream effects on digestion, immunity, energy, skin, and mood.
Research on traditional societies underscores just how far modern populations have drifted. Studies of communities like the Hadza in Tanzania and the Yanomami in Venezuela show they maintain significantly higher gut microbial diversity than Western populations, with bacterial groups that are virtually absent in industrialised guts.
Nobody is suggesting we go back to eating unwashed food. But we do need to recognise the biological gap modern life created, and find a way to close it.
Three Pillars of a Different Approach
Wild Fermentation as Biochemical Transformation
Fermentation Doesn't Just Preserve. It Transforms.
When herbs undergo wild fermentation, microbial enzymes reshape their plant chemistry. Phenolic compounds increase. New bioactive metabolites are created. Propolis phenols are specifically biotransformed during the process, changing their bioactive profile entirely.
The result is what scientists call "triple delivery." Fermented foods deliver three things simultaneously that probiotics cannot:
Live microorganisms that colonise the gut
A prebiotic matrix of fibres and polyphenols made more bioavailable through fermentation
Postbiotic metabolites including vitamins, organic acids, and bioactive compounds already produced during fermentation
Research supports the power of this approach. A landmark 2021 study published in Cell found that a fermented food diet increased microbial diversity and reduced systemic inflammation (measured by IL-6 levels) more effectively than a high-fibre diet alone (Wastyk et al., 2021).
There's also a critical distinction between wild and industrial fermentation. ReBiotika uses spontaneous wild fermentation, which produces natural microbial succession and a stable, diverse ecosystem. Industrial fermented products are typically pasteurised after production, leaving them microbiologically sterile.
And the source of the microbes matters. The organisms in ReBiotika come from the phyllosphere: the microbial communities living naturally on the surface of wild herbs. These phyllosphere strains are more resilient and metabolically active than laboratory monocultures. Their primary role in the formula is the internal preparation of food into a form that is appropriate and safe for the microbiome and the digestive tract.
Beyond Probiotics (The Postbiotic Matrix)
CFU Counts Only Tell Part of the Story
Live bacteria only
Live organisms + Prebiotics + Postbiotics
Traditional probiotics focus on CFU (colony-forming unit) counts. The higher the number, the better, or so the marketing goes.
But CFU only measures live bacteria. It completely misses the metabolites, organic acids, cell-wall compounds, and signalling molecules that also influence gut health. These compounds are collectively known as postbiotics, and the International Scientific Association for Probiotics and Prebiotics (ISAPP) formally recognised their importance in a 2021 consensus definition (Salminen et al., Nature Reviews Gastroenterology & Hepatology).
ReBiotika delivers the complete fermentation matrix: the ISAPP-recognised "triple delivery" of live microorganisms, a prebiotic matrix, and postbiotic metabolites. All produced naturally during the fermentation process, not added afterwards.
80+ Species and Microbial Diversity
Diversity Is the Foundation of a Resilient Ecosystem
bacterial strains
microbial species
Most probiotic supplements contain between 1 and 15 strains of bacteria, grown in controlled laboratory conditions.
ReBiotika's wild fermentation of 7 traditional herbs produces a living ecosystem of 80+ microbial species. This diversity is not incidental. Research has consistently shown that microbial diversity is a core marker of ecosystem health and resilience (Lozupone et al., 2012, Nature).
The wild and phyllosphere strains in ReBiotika are more resilient and metabolically active than laboratory monocultures, because they've evolved in the complex, competitive environment of a living herb surface rather than in the controlled conditions of a sterile lab.
How It Works in Your Body
Simplified anatomical illustration showing the gut barrier, SCFAs, butyrate, and barrier cells
The gut barrier is the central character in this story. It's a single-cell-thick lining that decides what enters your bloodstream and what stays out. When it functions well, you don't think about it. When it doesn't, everything downstream is affected.
The primary fuel source for these barrier cells is short-chain fatty acids (SCFAs), particularly butyrate, produced by microbial fermentation. SCFAs cover 60-70% of the energy needs of gut barrier cells. When microbial diversity drops, SCFA production falls with it. The barrier weakens. Bacterial compounds called lipopolysaccharides (LPS) can then leak into circulation, triggering low-grade systemic inflammation. Scientists call this metabolic endotoxemia.
This is why gut health affects far more than digestion. The gut connects to virtually every other system in the body through what researchers call the gut-organ axes:
The gut-brain axis
Your gut produces 90-95% of your body's serotonin and communicates directly with the brain via the vagus nerve. A disrupted gut ecosystem can affect mood and mental clarity.
The gut-skin axis
Emerging research links gut dysbiosis to inflammatory skin conditions. When the gut barrier is compromised, systemic inflammation can manifest on the skin.
The gut-immune axis
With 80%+ of the immune system housed in the gut, microbial balance directly influences how your body responds to threats.
"The principle is straightforward: support the gut ecosystem and barrier first, because that's where microbial signals interface with every other system in the body."
The Research Behind ReBiotika
The studies below support the scientific mechanisms behind ReBiotika's formulation: wild fermentation, phyllosphere ecology, microbial diversity, barrier integrity, and postbiotic activity.
Fermentation Science
Wastyk et al. (2021) Cell
A high-fermented-food diet increases microbiome diversity and decreases molecular markers of inflammation. Participants consuming a diet rich in fermented foods showed significantly increased microbial diversity and reduced inflammatory markers, including IL-6, compared to those on a high-fibre diet.
Mukherjee et al. (2025) Frontiers in Nutrition
A systematic review and meta-analysis of fermented food consumption in healthy adults. Found that fermented foods beneficially impacted bowel movement frequency, stool consistency, transit time, and abdominal symptoms.
Phyllosphere and Microbial Ecology
Vorholt (2012) Nature Reviews Microbiology
Microbial life in the phyllosphere. Establishes the scientific foundation for plant-surface microbial communities: structured habitats on leaves and stems that carry diverse, metabolically active organisms.
David et al. (2014) Nature
Diet rapidly and reproducibly alters the human gut microbiome. Demonstrates that short-term dietary changes can shift microbial community structure and gene expression within days.
Microbiome Diversity and Resilience
Lozupone et al. (2012) Nature
Diversity, stability and resilience of the human gut microbiota. Establishes that microbial diversity is a key indicator of ecosystem health, with reduced diversity consistently associated with disease states and metabolic dysfunction.
Schnorr et al. (2014) Nature Communications
Gut microbiome of the Hadza hunter-gatherers of Tanzania. Demonstrates that traditional societies maintaining ancestral dietary patterns harbour significantly higher gut microbial diversity than Western populations.
Clemente et al. (2015) Science Advances
The microbiome of uncontacted Amerindians. Found the highest microbial diversity ever recorded in a human group among the Yanomami of Venezuela, reinforcing that modern Western lifestyles are associated with substantial loss of ancestral microbial diversity.
Barrier Integrity
Parada Venegas et al. (2019) Frontiers in Immunology
Short-chain fatty acids (SCFAs) as mediators of intestinal epithelial barrier function. Demonstrates the critical role of microbially-produced SCFAs, particularly butyrate, in maintaining gut barrier integrity.
Mohammad and Thiemermann (2021) Frontiers in Immunology
Role of metabolic endotoxemia in systemic inflammation and potential interventions. Details how a compromised gut barrier allows bacterial lipopolysaccharides (LPS) to enter circulation, triggering low-grade systemic inflammation.
Postbiotic Definition
Salminen et al. (2021) Nature Reviews Gastroenterology & Hepatology
The International Scientific Association of Probiotics and Prebiotics (ISAPP) consensus statement on the definition and scope of postbiotics. Formally establishes the scientific framework for postbiotic compounds and their role in gut health.
Transparency statement:
These studies support the scientific mechanisms behind ReBiotika's formulation. They are not clinical trials of the ReBiotika product itself. We cite them because the principles they establish (the importance of microbial diversity, the role of SCFAs in barrier function, the benefits of fermented foods over isolated strains) are the foundations on which ReBiotika is built.