Focus:
Understanding that your nervous system is listening, and giving it signals of safety.
Repetition:
My nervous system is safe.
My body knows how to heal.
I am held. I am whole.
The Birth Microbes: The Living Inheritance, Who They Are, What They Do, and How They Come Home
A Word Before We Begin
We are not one body. We are an ecosystem. The microbes that live in our gut, on our skin, in our mouth, and in every mucous membrane outnumber our own cells. They make vitamins for us, neurotransmitters for us, hormones for us. They guard the border of the gut. They teach the immune system who is self and who is not. They eat the food that we cannot, and turn it into the substances we cannot make on our own.
They are not our guests. They are us, the part of us we were meant to receive at birth, the way we were meant to receive our mother’s milk and our grandmother’s songs.
“The birth microbes are not bonus. They are the immune system. They are the second half of us.”
Many of us have lost much of this inheritance. Cesarean birth, antibiotics in infancy, antibiotics in our mothers and grandmothers, formula feeding, sterile homes, lack of animals, lack of soil under our fingernails, lack of being kissed on the head by people whose mouths carried living kefir, every link in the chain that was supposed to pass these strains on has been broken at one place or another.
The autoimmunity, the depression, the hair loss, the anxiety, the fatigue, the food intolerances we now carry in epidemic numbers, these are, in large measure, the cost of having lost our microbes.
The good news is that the body never quite stops listening for them. Many can be re-seeded. Some can only be replanted from soil. Some come back through a single bite of properly fermented food. The work is to know which is which, to feed them what they actually eat, and to stop doing the things that have been killing them.
This article is the map.
How We Get Them: the Lineage
There is a sequence of seeding the body was built for. When any one part of it is broken, certain strains are missed; when the whole sequence is broken, the body is left under-seeded for life unless we deliberately rebuild.
In utero, the baby in the womb is not entirely sterile. Through the placenta, through swallowed amniotic fluid, certain bacterial fragments and live microbes already begin training the developing immune system.
Vaginal birth, the single most important seeding event of human life. The infant is bathed in the mother’s vaginal and perineal flora, Lactobacilli, Bifidobacteria, Bacteroides, which colonise the infant’s mouth, gut, and skin within hours.
Skin-to-skin in the first hour, the “golden hour” is real biology. The mother’s skin, breath, and chest microbes seed the baby’s skin and respiratory tract.
Colostrum, then breast milk, carries the mother’s strains directly into the infant gut, along with hundreds of varieties of human milk oligosaccharides (HMOs), the specific sugars Bifidobacterium infantis was designed to eat. Breast milk is the most sophisticated probiotic food on earth.
Kissing, holding, sharing food, every kiss on the head, every shared spoon, every chewed bite passed mouth-to-mouth (yes, this is ancestral and protective) passes microbes from grown body to growing body.
Pets and farm animals, dogs, cats, chickens, goats, cows. Children who grow up with animals have profoundly different (and richer) microbiomes than children who do not. Asthma and allergy rates are far lower in farm-raised children.
Soil, dirt under the fingernails, leaves chewed, mud on the face. Soil contains hundreds of organisms, particularly the Bacillus family, that we can only get this way.
The wider household and community, the microbiome of a family converges over time. Living with the same people, sleeping in the same room, eating from the same table, all transfer microbes.
Sun, water, and food grown locally, every plant pulled from living soil carries its own microbes; raw fermented foods carry billions of living organisms; small amounts of raw milk from a clean source carry the cow’s microbiome directly into the human.
How We Lose Them
Cesarean birth, the baby never passes through the vaginal canal; the seeding event simply does not happen. Skin and environmental microbes (often hospital strains) move in instead.
Antibiotics in labour, in infancy, or in the mother during pregnancy and breastfeeding, kills wide swaths of foundational strains. Some never recover. A single round of broad-spectrum antibiotics in infancy can permanently reduce diversity.
Formula feeding, formula contains no living microbes, no HMOs of the type the infant Bifidobacterium feeds on, and often added sugars and seed oils that feed the wrong organisms.
Sterile homes, hand sanitizer, antibacterial soaps, wipe out the daily small re-seedings that should happen continuously.
Lack of contact with animals, soil, and outdoors, no environmental re-seeding.
Glyphosate-treated food, glyphosate is patented as an antibiotic and disrupts the shikimate pathway that many gut microbes use.
Chlorinated and fluoridated tap water, kills sensitive microbes on contact.
Vaccines (the adjuvants, not the antigens), aluminium and polysorbate 80 alter the gut barrier and inflammatory tone in the infant.
Birth control pills, hormone therapy, alter the gut and vaginal microbiomes.
Stress and chronic inflammation, push the gut into the wrong terrain.
Carnivore diet or other strict starch- and fibre-free diet held longer than two years, many birth microbes are saccharolytic (sugar-eating in the technical sense, they feed on complex carbohydrates from plants); without their food, they first go dormant, then begin to die out. We will return to this in detail.
They Are the Immune System
Roughly 70% of the immune cells in the human body live in the gut wall. Their education, what is self, what is not self, what to tolerate, what to attack, comes from the birth microbes. The strains we received from our mothers train the regulatory T-cells (the cells that keep autoimmunity from happening), produce the anti-inflammatory cytokine IL-10, prime the secretory IgA that watches the gut border, and shape the entire pattern of immune response for the rest of life.
Specifically, the birth microbes:
- Produce short-chain fatty acids, butyrate, propionate, acetate, that feed the colonocyte, calm inflammation, and signal to the brain through the vagus nerve.
- Produce IL-10 and TGF-beta, the body’s main anti-inflammatory signals.
- Produce bacteriocins, narrow-spectrum compounds that selectively suppress the wrong microbes without harming the right ones.
- Lower the gut pH through lactic acid production, which makes the environment hostile to many opportunists.
- Train regulatory T-cells (Tregs), the cells that prevent autoimmunity.
- Compete with opportunists for the gut niche, they take up the room, eat the food, and occupy the receptors that pathogens would otherwise take.
- Build and maintain the mucin layer that is the physical border of the gut.
- Modulate vagal tone, directly affecting heart rate variability, sleep, anxiety, and digestion.
When the birth microbes are well-seated and well-fed, the immune system is calm and accurate. When they are missing, the immune system is poorly trained, over-responding to harmless food proteins (allergies, food sensitivities), failing to recognise stealth pathogens, attacking the body’s own tissue where it crosses paths with infection (autoimmunity), and unable to settle when the threat has passed.
They Need Mucosa to Live In
The birth microbes do not float freely in the lumen of the gut. They live embedded in the mucin layer that coats the gut wall, a thick, gelatinous, two-layered substance produced by goblet cells and maintained primarily by Akkermansia muciniphila.
Without this mucin layer, the birth microbes have no home. They cannot seat. They cannot reproduce. They simply pass through and are lost.
This is why mucosa rebuild always comes first in the ARP protocol. Meat stock, gelatin, glycine, proline, zinc carnosine, vitamin A, colostrum, and the gentle daily seeding of L. fermentum CECT5716 together rebuild the mucin layer. Akkermansia is added later, once tolerance is established, to maintain it. Without this foundation, even the best probiotic capsule is a waste, there is nowhere for the microbes to land.
They Feed Us
Far from being a passive lining, the birth microbes are an internal manufacturing system. They make many of the nutrients we cannot make ourselves, and they convert the food we eat into substances our cells can actually use.
B vitamins, Bifidobacterium synthesizes B1, B2, B3, B6, B9 (folate), B12, and K2. Eubacterium makes B7 (biotin), B12, and K2. Lactobacillus produces B2. Ligilactobacillus produces B2 and B12. Leuconostoc produces B2 and B9. When the birth microbes are full and happy, B-vitamin deficiency is far less likely. When they are missing, no B-complex supplement fully compensates.
Vitamin K2, directs calcium into bone and out of soft tissue. Made by Bifidobacterium, Eubacterium, and others.
Short-chain fatty acids, butyrate (the colonocyte’s preferred fuel and a profoundly anti-inflammatory molecule), propionate, acetate, valerate, caproate. Without these, the colon wall starves and the gut becomes leaky.
GABA, the body’s primary calming neurotransmitter. Produced by Lactiplantibacillus and Lactobacillus rhamnosus. Low GABA is a common driver of anxiety, insomnia, and racing thoughts.
Serotonin precursors, many birth microbes modulate the production of serotonin (95% of which is produced in the gut). Anaerostipes is particularly involved.
Urolithins, Gordonibacter converts ellagitannins (from pomegranate, walnuts, berries when reintroduced) into urolithins, which are profound mitochondrial protectors.
Equol, Adlercreutzia converts soy and clover isoflavones into equol, an oestrogen-balancing molecule (relevant for those whose diet includes small amounts of these foods).
Conjugated linoleic acid (CLA), Butyrivibrio produces it; supports immune and metabolic function.
Histamine balance, Lactiplantibacillus and Ligilactobacillus support DAO enzyme activity, which breaks down dietary histamine. Without them, histamine intolerance can become chronic.
Oxalate degradation, Oxalobacter degrades oxalate, preventing calcium-oxalate kidney stones. Without it, oxalate accumulation drives joint pain, fatigue, and stones.
Hair Loss When They Are Dormant, and Hair Regrowth When They Are Happy
Hair tells the story of the birth microbes loudly. Eubacterium and several other gut species synthesize biotin (B7) directly in the colon. So do Bifidobacterium and a handful of butyrate producers, all of which also support copper utilisation, ferritin synthesis, and the methylation cycle that feeds the follicle.
When these microbes are happy, biotin and the supporting nutrients flow steadily into the bloodstream. When they are dormant or absent, biotin production drops, copper and ferritin destabilize, methylation slows, and the follicle stops cycling properly. Hair sheds. Eyebrows thin from the outer third. Nails become brittle. Skin loses its glow.
When the birth microbes come back, properly fed, properly housed in the mucin layer, hair regrowth is one of the most consistent signs we see. It often appears around month 4 to 6 of focused rebuild, just as the first new red blood cells from the first nourished cohort begin to circulate. This is not coincidence; it is the same underlying repair making itself visible in different tissues.
The hair becomes thicker, shinier, less prone to shedding. Eyebrows fill in. Nails grow strong. The face changes.
What They Eat and What They Do Not
Most of the birth microbes are saccharolytic, they feed on specific complex carbohydrates and fibres that the human body cannot digest itself. We pass these substrates through to the colon, where the microbes break them down and turn them into the substances we need. This is one of the most ancient and beautiful pieces of biology we know.
The substrates we work with, drawn from our practical experience and tested for tolerance, are:
- Human milk oligosaccharides (HMOs), the original and best substrate, especially for Bifidobacterium. Available now as supplements; ideally also delivered through breastfeeding in infancy.
- Partially hydrolyzed guar gum (PHGG, Sunfiber), broad food for most of the butyrate-producing guild, Faecalibacterium, Roseburia, Anaerostipes, Christensenella, Lachnospira, Eubacterium, Subdoligranulum, Blautia, Dorea, and many others.
- Inulin, feeds Bifidobacterium, Anaerocolumna, Blautia, and many; from chicory root, Jerusalem artichoke, dandelion root.
- Fructo-oligosaccharides (FOS), Lactobacillus, Bifidobacterium, Anaerotignum, Anaerostipes.
- Tributyrin, butyrate delivered directly to the colon; supports Anaerobutyricum, Butyrivibrio, Caproicibacterium, Lawsonibacter, and many.
- N-acetyl-glucosamine (NAG) and colostrum peptides, specifically feed Akkermansia muciniphila to rebuild the mucin layer.
- Pomegranate polyphenol extract, feeds Gordonibacter to make urolithins.
- Galacto-oligosaccharides (GOS), Adlercreutzia, Lactobacillus, Leuconostoc, Ligilactobacillus.
- Acacia fibre, Bifidobacterium, Blautia.
- Arabinogalactans (larch), broad butyrate producers.
- Green plantain flour (resistant starch type 2 / RS2), feeds Caproicibacter, Dysosmobacter, Kineothrix, Ruminococcus, Anaerostipes.
- Hibiscus tea polyphenols, Akkermansia, broader butyrate guild.
- Apple pectin, Bifidobacterium and the broader butyrate guild.
- Lactose (from a teaspoon of raw milk), Lactobacilli, Bifidobacterium.
- Isoflavone (daidzein), Adlercreutzia.
- Oxalate (micro-dose, from a careful trace), Oxalobacter, given only in tiny amounts to keep this strain alive.
What we do not use
Even though potatoes and rice contain resistant starch, we do not use them as substrate. Potatoes carry nightshade alkaloids (solanine) that drive inflammation and joint and skin reactivity; rice contains arsenic, raises blood sugar sharply, and feeds Klebsiella and other auto-brewery and starch-fermenting opportunists in dysbiotic guts. Green plantain (resistant starch type 2, eaten very small and unripe) is the resistant-starch substrate we do use.
Sweet fruit, honey, maple syrup, sugar, and all refined carbohydrates feed Candida, Klebsiella, sugar-loving Streptococcus, and the wider opportunistic guild before they ever reach the birth microbes, they are net-negative for the terrain.
Grains, legumes, beans, and most seeds carry phytates and lectins that disrupt the gut wall faster than they feed any beneficial microbe. Even sourdough fermentation does not fully address this for an autoimmune or dysbiotic gut. We rebuild first, expand later, in tiny amounts.
The Carnivore Problem: Why More Than Two Years Without Plants Is Risky
A long carnivore or strict zero-carb diet is profoundly helpful in the short and medium term, it removes the substrates that feed Candida and the opportunists, it gives the immune system a rest from food triggers, it pulls the body into clean fat-burning, it heals the gut barrier through animal-fat-and-stock biology. We use this approach widely in the early phases of ARP.
But it has a cost that does not show for the first eighteen to twenty-four months and becomes serious thereafter. The cost is the loss of the birth microbes.
Most of the birth microbes, Bifidobacterium, Faecalibacterium, Roseburia, Christensenella, Akkermansia, Eubacterium, Lachnospira, the entire butyrate-producing guild, feed primarily on plant-derived complex carbohydrates and oligosaccharides. When their food is fully removed, they first slow down. Then they go dormant, present but inactive, not producing butyrate or B vitamins or training the immune system. Then, somewhere between eighteen months and three years, they begin to disappear from the stool sample altogether. Once a strain has truly died out, it is very difficult to bring back without reintroducing it directly.
The window for safe long-term carnivore is therefore roughly two years for most bodies. Beyond that, even in an otherwise thriving carnivore, we begin to see: hair loss, low ferritin that will not climb, mood changes, decreased stress tolerance, sleep disruption, weakening of the immune response, recurring infections, oxalate or histamine flares, food sensitivities multiplying when plants are eventually reintroduced. These are the birth microbes signalling, and then, eventually, dying.
Two paths to avoid this:
If you are using carnivore as a therapeutic stage, plan to begin the gentle reintroduction of birth-microbe feeders (Phase 3 substrates, in tiny amounts) by the eighteen-month mark.
If you are already past two years of pure carnivore and feeling some of the signs above, begin the replanting work below carefully, recognising that some strains may need to be reintroduced as live organisms (raw fermented foods, soil exposure, targeted probiotics), not just fed.
Carnivore is a tool. It is not a destination. The destination is a well-seeded, well-fed, well-rested human eating the food humans were built for, which includes a small, careful amount of properly grown plant matter to keep the birth microbes alive.
Soil Microbes: How They Help Regrow the Birth Microbes
When the birth microbes are diminished, certain hardy soil organisms, passed by clean earth, by being outside, and by carefully selected supplements, act as scaffolding while the resident strains rebuild.
They are not themselves birth microbes (they do not seat permanently in the gut), but they break up biofilms of opportunists, lower inflammation, produce narrow-spectrum displacing compounds that selectively suppress the wrong microbes, and create the conditions in which the birth microbes can settle back in.
Bacillus subtilis (HU58 strain), the workhorse. Powerful biofilm disruptor; effective against Streptococcus, Klebsiella, Staph, Candida, and many soil-borne opportunists. Produces surfactin and other compounds that selectively suppress the wrong microbes. Foundational in almost every ARP protocol.
Bacillus coagulans, antagonist to Clostridia and Candida; produces lactic acid that lowers gut pH and supports Lactobacillus regrowth.
Bacillus clausii (multi-strain, O/C, SIN, N/R, T), well-studied displacer of Streptococcus and Clostridia; survives stomach acid easily; supports the broader bacterial rebuild.
Bacillus licheniformis, another spore-forming soil organism; supports the protease/lipase activity of the gut and the wider microbial reset.
Bacillus indicus and Bacillus megaterium, spore-forming carotenoid producers; broadly anti-inflammatory; common in soil-based-organism (SBO) products.
Bacillus laterosporus, particularly useful against Candida and yeast overgrowth.
Saccharomyces boulardii (CNCM I-745), a beneficial yeast that lives transiently in the gut; clears Candida, C. difficile, Giardia, Blastocystis; supports IgA; preserves bile-acid metabolism, gives the resident strains a quieter terrain to grow back into.
Soil microbes can be acquired in any of these ways:
- Eating raw vegetables, herbs, and small roots pulled from clean, living soil (your own garden, a trusted local farm, a forest forage).
- Hands in soil, gardening daily, weeding, planting, even just turning a compost pile. The microbes enter through the skin and inhalation.
- Bare feet on bare earth, daily; not just for the electrons but for the small ongoing microbial transfer.
- Raw fermented dairy from a known clean source, kefir, clabber, cultured cream, aged raw cheese.
- Forest bathing, walking slowly through woodland, breathing in the volatile compounds and microbes the trees release.
- Time with farm animals, chickens, goats, sheep, cows, horses, pigs. Their bedding, their breath, their fur.
- Living with healthy pets, especially dogs that go outside.
- Letting children play in dirt without rushing to wash their hands.
- Raw fermented foods made with raw vegetables from clean soil, wild sauerkraut, fermented carrots, fermented garlic. The wild ferment retains the soil organisms.
- A small daily dose of soil-based organisms in supplement form, typically a Bacillus subtilis HU58 or a multistrain Bacillus product.
The Individual Birth Microbes: What They Do, Who They Defend Us Against, What Happens When They Go Dormant
Below are the major birth-microbe genera we work with most often. Each profile includes what the genus does for us, the unwelcome organisms it displaces or defends against, the symptoms that appear when it is dormant or missing, and how it is replanted or fed.
Bifidobacterium (B. infantis, B. longum, B. breve, B. bifidum)
What it does, the foundational infant strain; ferments human milk oligosaccharides; synthesizes B1, B2, B3, B6, B9 (folate), B12, and K2; produces acetate and lowers gut pH; trains regulatory T-cells; modulates cortisol and serotonin; supports IgA.
Defends us against, pathogenic E. coli, rotavirus, Bacteroides excess, Parabacteroides, Alistipes, Barnesiella, Butyricimonas, Phocaeicola, Sutterella, Slackia, Flavonifractor, Eggerthella, Methanobrevibacter, Collinsella, Coprobacter, Muribaculum, Romboutsia, Lacrimispora.
Symptoms when dormant, almost universal symptoms, low ferritin, B-vitamin deficiency, hair loss, brain fog, anxiety, depression, autoimmunity, food sensitivities, eczema, constipation or diarrhoea, recurrent infections, methylation issues, weak immune response to viruses.
Replant, L. fermentum CECT5716 prepares the mucosa first; then a quality Bifidobacterium infantis (or B. longum BB536) supplement. Food: HMOs as the primary feeder; GOS, FOS, acacia, inulin secondary. Raw breast milk for infants where possible. Tiny pinches, watching tolerance.
Lactobacillus (and Lactiplantibacillus, Ligilactobacillus, Lactococcus)
What it does, produces lactic acid (lowers gut pH, hostile to opportunists), produces B2 (riboflavin) and supports B12, raises mucosal IgA, balances histamine via DAO support, modulates immune response. Lactiplantibacillus also produces GABA. Ligilactobacillus produces lactic acid plus B2 and B12.
Defends us against, Klebsiella, Citrobacter, Pseudomonas, Stenotrophomonas, Lactococcus excess, Coprococcus excess, Faecalibacillus excess, Anaerotruncus, Acidaminococcus, Amedibacterium, Aristaeella, Duodenibacillus, Hungatella, Komagataeibacter, Phascolarctobacterium excess, Paraprevotella, Ruthenibacterium, Streptococcus (oral).
Symptoms when dormant, histamine intolerance, mast cell symptoms, anxiety, insomnia, recurrent UTIs and yeast infections, frequent throat infections, mood swings, food sensitivities, eczema.
Replant, L. plantarum 299v, L. salivarius UCC118, L. rhamnosus GG, L. reuteri DSM 17938, L. fermentum CECT5716. Food: FOS, GOS, HMOs, arabinogalactan, lactose (from a teaspoon of raw milk). Raw 24-hour-fermented dairy is the traditional source.
Akkermansia muciniphila
What it does, the mucin-layer specialist; regenerates the mucous barrier and the tight junctions between gut cells; increases endocannabinoid tone; supports glucose control and metabolic flexibility; modulates insulin sensitivity. Without Akkermansia, the gut wall thins.
Defends us against, the broader opportunistic guild that depends on a thinned mucin layer to colonise; metabolic dysbiosis.
Symptoms when dormant, leaky gut, food sensitivities multiplying, blood sugar instability, weight gain or loss without explanation, autoimmunity, low metabolic flexibility, fatigue.
Replant, live Akkermansia supplement, once tolerance is established. Food: N-acetyl-glucosamine (NAG), colostrum peptides, pomegranate polyphenol extract, hibiscus tea, apple pectin.
Faecalibacterium prausnitzii
What it does, the great butyrate producer; profoundly anti-inflammatory; generates IL-10, restores T-regulatory cell balance, prevents leaky gut; the single most consistently low organism in autoimmune patients.
Defends us against, the inflammatory cascade itself, without F. prausnitzii, no antagonist alone can fully quiet inflammation; opportunists that thrive in low-butyrate gut.
Symptoms when dormant, autoimmunity of any kind, IBD, Crohn’s, ulcerative colitis, chronic inflammation, depression, fatigue, brain fog, eczema, psoriasis.
Replant, no direct supplement is widely available; it must be grown back. Food: PHGG (Sunfiber), inulin, arabinogalactan, apple pectin. Tributyrin can stand in temporarily while it returns.
Roseburia intestinalis
What it does, butyrate and acetate producer; improves the colonocyte oxygen gradient (which is itself the brake on opportunist overgrowth); supports gut barrier.
Defends us against, the same low-butyrate opportunists Faecalibacterium guards against; helps maintain the anaerobic environment that keeps oxygen-tolerant opportunists out.
Symptoms when dormant, leaky gut, fatigue, colonocyte starvation, mood disturbance.
Replant, PHGG, inulin, arabinogalactan.
Christensenella
What it does, increases butyrate and acetate; correlates with longevity, lean phenotype, and serotonin balance. Christensenella is one of the most heritable genera, strongly inherited from mother to child.
Defends us against, metabolic dysbiosis, weight gain, mood disturbance.
Replant, PHGG, inulin, arabinogalactan.
Symptoms when dormant, weight changes that do not respond to diet, mood instability, lower longevity markers.
Eubacterium
What it does, synthesizes B7 (biotin), B12, and K2; major butyrate producer; supports the mitochondria of the colonocyte.
Defends us against, biotin and B12 deficiency; mitochondrial dysfunction in the gut wall; opportunist overgrowth in a low-butyrate gut.
Symptoms when dormant, hair loss (low biotin), nail brittleness, eyebrow thinning, B12 deficiency, fatigue, neurological symptoms, weak follicle function.
Replant, inulin, tributyrin, PHGG.
Anaerostipes and Anaerobutyricum
What it does, converts lactate (produced by Lactobacilli) and amino acids into butyrate; regulates serotonin and colonic energy. The bridge between the lactic acid producers and the butyrate producers.
Defends us against, D-lactate buildup (which causes brain fog), opportunists that thrive in lactate-rich gut.
Symptoms when dormant, brain fog after eating fermented foods, dizziness, fatigue after meals.
Replant, PHGG, inulin, tributyrin, green plantain (RS2).
Lactiplantibacillus
What it does, produces GABA, folate (B9), and short-chain lactic acids; balances histamine.
Symptoms when dormant, histamine flares, anxiety, insomnia, mood swings, racing thoughts, hives, eczema.
Defends us against, histamine intolerance, mast cell activation, opportunists that exploit a histamine-high gut, Streptococcus (oral and gut), Phascolarctobacterium excess.
Replant, arabinogalactan, FOS, GOS. L. plantarum 299v is the supplement form.
Adlercreutzia
What it does, converts plant isoflavones (daidzein) into equol, an oestrogen-balancing molecule that supports bone density, mucosal immunity, and hormonal balance, especially in perimenopause.
Defends us against, oestrogen imbalance, weak hormonal protection, bone loss.
Symptoms when dormant, perimenopausal symptoms, bone density loss, hormonal instability.
Replant, GOS, inulin; small amounts of fermented isoflavone-rich foods when reintroduced.
Gordonibacter
What it does, converts ellagitannins from pomegranate, walnuts, and berries into urolithins, among the most potent mitochondrial boosters and cellular renewal compounds we know.
Defends us against, mitochondrial decline, oxidative stress, premature aging at the cellular level.
Symptoms when dormant, low energy, slow recovery, accelerated aging markers.
Replant, pomegranate polyphenol extract, GOS, inulin.
Oxalobacter
What it does, degrades oxalate; prevents calcium-oxalate kidney stones; protects joints, kidneys, and bone.
Replant, Oxalobacter is fragile and notoriously difficult to replant. A tiny micro-dose of calcium-oxalate trace as substrate; PHGG and GOS support. Avoid high-oxalate foods (spinach, almonds, chocolate, sweet potato) until restored.
Defends us against, oxalate accumulation in the body, kidney stones, joint pain from oxalate crystals.
Symptoms when dormant, recurrent kidney stones, joint pain, gritty eye sensation, vulvar pain in women, fatigue.
Lachnospira, Subdoligranulum, Blautia, Dorea, Butyrivibrio
What it does, the broader butyrate guild; produce butyrate and acetate; modulate bile acid recycling; support insulin sensitivity; produce CLA (Butyrivibrio); enhance mucosal IgA (Lachnospira).
Defends us against, metabolic dysbiosis, insulin resistance, opportunists in the low-butyrate gut.
Symptoms when dormant, blood sugar instability, weight changes, fatigue, low IgA (frequent illness).
Replant, PHGG, inulin, acacia fibre, tributyrin.
Leuconostoc
What it does, produces B2, B9, and dextrans that serve as mucosal scaffolding. Common in raw fermented vegetables.
Defends us against, Klebsiella, opportunists in the mucosal niche.
Symptoms when dormant, low folate, mucosal weakness.
Replant, raw fermented vegetables (wild sauerkraut, fermented carrots), a tablespoon of the brine daily.
Roseburia, Coprococcus, Anaerocolumna, Marvinbryantia, Mediterraneibacter, Sellimonas, Thomasclavelia, Vescimonas
What it does, the broader anaerobic butyrate guild; produce butyrate and acetate; support colonocyte function; regulate the IFN-γ/IL-10 ratio; lower CRP and strengthen mucosal barrier.
Defends us against, inflammation, gut wall thinning, opportunist overgrowth.
Symptoms when dormant, chronic inflammation, autoimmunity, fatigue.
Replant, PHGG, inulin, arabinogalactan.
First Foods for the Baby, to Seed and Feed the Birth Microbes from Day One
The first foods a baby eats shape the microbiome for life. The ancestral wisdom on this is consistent across the early-twentieth-century surveys of traditional cultures, the practical work of contemporary ancestral nutrition teachers, and the lived experience of unbroken food traditions: babies were given small, deeply nutrient-dense animal foods first, often raw or gently warmed, long before any grain or starch was offered.
Modern infant feeding, rice cereal at four months, fruit purees, factory baby food, has it almost exactly backwards. The order and timing below are gentle guides; the body of the individual baby always leads.
Birth to roughly six months
Mother’s colostrum and then milk, exclusively. Breast milk is the most sophisticated probiotic food on earth and the primary feeder of B. infantis.
If the mother cannot breastfeed: a properly prepared homemade raw-milk-based formula in the ancestral tradition (raw goat or cow milk, raw whey, raw cream, cod liver oil, gelatin, lactose, mineral salt, never the modern industrial formula with corn syrup solids and soy).
Skin-to-skin daily; hands in soil with mother; pets in the house; bare feet on earth.
Around four to six months, the first solid bites, in tiny amounts
Raw egg yolk from a pastured hen, soft, room temperature, mixed with a little raw butter and a pinch of mineral salt. Begin with a small fingertip and build to one full yolk a day. Choline, retinol, B12, folate, cholesterol, DHA. Skip the white until later.
A small amount of grated raw frozen liver from a clean source, beginning with a quarter-teaspoon mixed into the yolk. Heme iron, retinol, B12, folate.
A teaspoon of warm meat stock (no bone broth, gentle 1.5-hour meat stock), sipped from a small spoon. Glycine, gelatin, minerals.
Ripe avocado mashed with a little raw butter.
Cod liver oil and high-vitamin butter oil, a few drops a day, building slowly.
Six to twelve months
Soft scrambled or soft-yolked egg in raw butter.
Bone marrow scooped from a slow-cooked marrow bone, soft and warm.
Gently stewed carrots and onions in animal fat, a small spoon mashed.
Raw butter on everything.
24-hour fermented raw yogurt or kefir, beginning with a quarter-teaspoon and building.
Soft-cooked finely ground or shredded meat, beef, lamb, chicken thigh.
More liver, half a teaspoon grated raw or finely cooked.
Small amounts of properly soured cottage cheese or aged raw cheese.
Sauerkraut brine, a single drop on the tongue, building to a teaspoon.
Plenty of time outside, hands in dirt, animals around.
What we set aside in infancy
No grains, no rice cereal, no oats, no wheat. The baby’s gut is not equipped to handle grain starches in the first year, and rice cereal especially carries arsenic and an excess of bare starch that feeds the wrong organisms.
No fruit juice. No sweet fruit purees as a daily food. No honey before twelve months (botulism risk). No soy, no industrial seed oils. No commercial baby food with added sugar, starch, or preservatives. No water from chlorinated or fluoridated tap (use filtered). No nightshades early, tomato, pepper, eggplant, white potato, wait until well past one year.
The babies who are old enough to eat starch: a careful note
Some of the birth microbes only fully wake up once a child can eat complex carbohydrates, particularly the heavier starch-fermenters of the broader butyrate guild. This is part of why traditional cultures introduced small amounts of well-prepared, properly soured starches (sourdough soaked for many hours, green plantain cooked in animal fat, well-cooked roots from clean soil) somewhere between one and two years, never before.
In our framework, we do not introduce starches at all in active autoimmune or dysbiotic recovery, and we never use potatoes or rice. When and if starches are reintroduced, it is in tiny amounts, with green plantain (resistant starch type 2) as the gentlest first option, watching the body.
Replanting: How to Bring Them Back
The order of replanting matters as much as the substances. Rushing creates die-off, temporary inflammation, and discouragement. Going at the pace of the body’s tolerance is what builds the new microbial home.
Step 1: Build the mucin layer first
Without the mucin layer there is nowhere for the birth microbes to seat. This is non-negotiable.
Daily meat stock (1.5-hour gentle stock, never bone broth).
Zinc carnosine 25-30 mg with food, with copper at a 10:1 to 15:1 ratio.
MSM from the beginning of the protocol, built up slowly (1 g/day, increasing by 1 g/week to 3-5 g/day in divided doses with food).
Vitamin A (retinol) from cod liver oil and small amounts of organ meat.
Colostrum (raw or low-heat), a pinch to half a teaspoon on empty stomach.
L. fermentum CECT5716, the foundational birth-canal strain that begins to re-seat the mucosa. ¼ capsule daily; long-term.
HMOs, a pinch with each dose of L. fermentum to feed it.
Step 2: Add the soil microbes
Once tolerance is established, add the housekeeping spore-formers.
Bacillus subtilis HU58, ¼ capsule daily, increasing slowly.
Rotate in Bacillus coagulans and Bacillus clausii over months.
Daily hands in soil, bare feet on earth, time with animals.
Saccharomyces boulardii CNCM I-745, for defined runs to clear yeast and protect against opportunists.
Step 3: Reseed the Lactobacilli and Bifidobacteria
Lactobacillus plantarum 299v, for histamine balance and broad displacement.
Lactobacillus rhamnosus GG, for vagal tone, GABA, immune modulation.
Lactobacillus reuteri DSM 17938, for oxytocin, oral health, H. pylori displacement.
Lactobacillus salivarius UCC118, for oral-origin organisms.
Bifidobacterium infantis, B. longum BB536, B. breve, B. bifidum, for the foundational infant family.
Raw 24-hour fermented dairy as it is tolerated.
Daily sauerkraut brine, fermented carrots, fermented garlic, beginning with drops.
Step 4: Add Akkermansia and the broader resident strains
Akkermansia muciniphila, once tolerance is established.
HMOs and N-acetyl-glucosamine continue to feed the mucin layer.
Apple pectin and hibiscus tea support Akkermansia and broader Bifidobacterium.
Step 5: Feed the butyrate guild
This is the longest, slowest stage. Begin only when significant healing is felt, often months four to six, and quantities stay very small until the two-year mark or three months in remission.
PHGG (Sunfiber), a pinch stirred into water or stock once daily, building slowly.
Acacia fibre, a pinch.
Arabinogalactan, a small daily dose.
Tributyrin, direct butyrate to feed the colonocyte while Faecalibacterium and Roseburia return.
Green plantain (RS2), ¼ of a green plantain chip cooked in animal fat, or a small slice.
Inulin, a pinch (from chicory root, Jerusalem artichoke, dandelion root).
FOS and GOS, pinches.
Pomegranate polyphenol extract, a pinch to feed Gordonibacter.
Tiny amounts of raw milk for lactose, a teaspoon, building.
Temporary Inflammation When They Are Coming Back
When the birth microbes begin to repopulate, the immune system briefly fires up. This is not a setback, it is the immune system re-recognising the microbes it was meant to know, and the ecosystem of the gut shifting as opportunists are displaced.
The first few weeks of mucosa rebuild can bring transient symptoms:
- Mild fatigue or “feels like a cold coming on” without a cold.
- Loose stools or constipation for a few days as the ecosystem shifts.
- Mild skin breakouts, brief itching, transient rashes.
- Mild brain fog or mood dip, especially when adding fermented foods or HMOs for the first time.
- Increased gas, bloating, gurgling, the sound of a gut waking up.
- A brief flare of an old symptom you have not had in months, almost always a sign that the system has finally caught up with the old burden it had been carrying silently.
These pass in two to seven days at the most. Increase the meat stock. Take a detox bath. Slow down. Move at the body’s pace. Do not abandon the protocol, these signs are the protocol working.
If a symptom is severe or persists beyond a week, pause adding new substrates and hold the current stack until the body settles.
A Closing Word
We were never meant to be alone in our own bodies. The birth microbes are part of who we are. They are the second half of our digestion, much of our immune system, and a great deal of what makes our moods steady, our sleep deep, our hair full, our skin clear, our hormones balanced, and our energy reliable. They came to us through our mothers, through their mothers, through the soil and the animals and the unwashed kitchens of every generation that came before.
We can bring them home.
The work is slow on purpose. Mucosa first. Soil microbes for scaffolding. Lactobacilli and Bifidobacteria reseeded. Akkermansia to keep the mucin layer thick. The butyrate guild fed last, in tiny amounts, over years.
Hair returns. Sleep deepens. Mood steadies. The skin clears. The autoimmunity quiets. The food we eat finally starts to count for something inside the body, because the body finally has the partners it was meant to share its meals with.
“We do not just feed ourselves. We feed the ones who feed us back. When we feed them well, they make us whole.”