Live From Dr. Sean, The Hidden Fat Your Doctor Never Looks For
In a Nutshell
Epigenetic patterns in cord blood at birth determine which gut microbes colonize infants in their first year, with Lachnospira pectinoschiza strongly linked to lower autism and ADHD risk by age three. The microbiome acts as a modifiable buffer that can partially offset high-risk epigenetic profiles through short-chain fatty acid production and immune regulation. Early interventions like avoiding unnecessary antibiotics, breastfeeding, and gradual introduction of fermented foods offer practical ways to support beneficial colonization and reduce neurodevelopmental risk.
These notes were generated by AI and may contain inaccuracies.
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Promotions for products are offered without receiving any kickbacks or promotional codes from companies. Codes are provided solely to share benefits with viewers. In this case, Fermenting Fairy fermented foods are highlighted. Lauren produces small-batch fermented foods with the largest batch size being one gallon. The code Dr. Sean, 25 provides 25% off every order, not just the first order.
Fermented foods serve as a segue into discussing the microbiome's role in autism and ADHD. The research discussed is available on the Nestle website under CHILD's. The goal is to present ways to potentially diminish risk of a baby developing ADHD or autism and optimize human health.
The study examined two bacterial species: Lachnospira pectinoschiza and a second species discussed later. This research is positioned as one of the more interesting developments in gut microbe studies related to neurodegenerative and brain development research. The study followed 1,000 families.
Infants with specific epigenetic patterns suggesting certain DNA development showed increased DHA and higher risk for autism or ADHD. By age three, these children became more colonized with certain microbial species. Colonization by Lachnospira pectinoschiza occurred by the first year of life. This was an observational study showing associations rather than proving causation.
The study represents one of the strongest human signals reported for specific bacterial species connected to autism and ADHD. The central finding was that epigenetic programming at birth, measured through DNA methylation patterns in cord blood, influences which bacteria successfully establish during the first year of life.
The infant microbiome is dynamic and was associated with neurodevelopmental outcomes including early signs of autism spectrum disorder and ADHD by age three. Genes do not act alone. The epigenetics and microbiome have roles in influencing factors around genes, which in turn influence brain development. This establishes a clear pathway from birth through microbiome to neurodevelopment.
Typical studies compare children with autism versus children without autism, showing differences in gut bacteria. This design leaves open whether the microbiome caused autism or autism caused microbiome changes. This study was different because it looked prospectively at birth before autism symptoms appeared, providing a stronger design.
DNA methylation patterns found in umbilical cord blood predicted which microbes would colonize infants during the first year. This suggests the microbiome is partly programmed before the baby is born. This is described as a remarkable and potentially powerfully exploitable concept.
Lachnospira was associated with lower risk of autism and ADHD, even among children with high-risk profiles. This suggests a favorable, healthy microbiome may partially buffer and protect against genetically or epigenetically determined susceptibility to autism or ADHD. Epigenetics allows turning genes on and off, and the microbiome plays a major role in influencing genetic expression.
Autism risk is described as probably modifiable. The investigators were careful to note this was an observational study that did not prove causation. The microbiome is regarded as a modifiable pathway opening the door for potential intervention.
Early life factors that affect infant gut microbiome development include:
- Mode of delivery (C-section versus vaginal delivery)
- Breastfeeding
- Antibiotic exposure during labor
- Older siblings
- Gestational age
- Maternal allergy history
- Being born during certain pandemics like COVID
Antibiotics should be questioned when not clearly indicated. Overly aggressive antibiotic use during labor has been acknowledged as potentially contributing to later obesity and diabetes in children due to fear of lawsuits.
The microbiome is important because it affects immune development, inflammation, neurotransmitter production critical for brain development, and microbial metabolites known as postbiotics. Good microbes produce beneficial substances while bad microbes produce harmful ones. The goal is to minimize bad microbes and maximize good microbes.
Lachnospira produces short-chain fatty acids, particularly butyrate. Butyrate supports intestinal barrier function. While the study did not prove butyrate was the mechanism, it provides a plausible explanation. This species is an anaerobic organism, meaning oxygen is toxic to it. It lives in the colon and is difficult to culture outside the gut.
Fermented foods like kimchi do not directly provide Lachnospira because it is a strict anaerobe adapted to the large intestine and difficult to culture. Fermented foods are better regarded as fertilizers that create healthier conditions for these beneficial microbes to grow and establish themselves. The study does not show that gut bacteria cause autism, that autism can be prevented with probiotics, or that giving Lachnospira prevents ASD.
The study's biggest advance is not identifying one bacterial species but establishing the principle that epigenetics and the microbiome interact during a critical early developmental window to influence neurodevelopment. This shifts the conversation from genetics versus environment to genetics interacting with a modifiable microbiome environment.
The pathway is: birth epigenetic programming (DNA methylation) → infant gut microbiome development → protective microbes like Lachnospira → lower developmental risk → lower expression of ADHD and ASD.
Parabacteroides distasonis is another important candidate referred to as a next-generation probiotic. There is currently no human evidence that it prevents autism or ADHD. Children with autism often have altered gut microbiomes compared to neurotypical children. Animal studies suggest restoring certain gut bacteria can reduce neural inflammation.
P. distasonis produces metabolites that influence immune function and intestinal permeability. Leaky gut allows toxins and lipopolysaccharides into the bloodstream where they are not intended to go. This has a strong connection to the gut-brain axis. There are no trials showing that administering P. distasonis to infants prevents ASD or reverses established autism.
These beneficial microbes are associated with:
- Improved metabolic health including reduced obesity and insulin resistance
- Correction of fatty liver disease
- Better glucose metabolism and regulation
- Reduced intestinal inflammation in conditions like Crohn's disease and ulcerative colitis
- Improved epithelial and intestinal barrier function
- Reduced colitis severity
- Better immune regulation and tolerance
- Reduced activation of inflammatory pathways
- Experimental potential reduction in colon cancer
Three species available commercially on Amazon that act similarly are Lactobacillus rhamnosus GG, L. reuteri, and Bifidobacteria longum. These have been discussed in previous lives and the Alpha Maker program.
Potential benefits beyond neural development include better gut barrier, lower systemic inflammation, lower rates of allergic disease, and more diverse gut microbiome.
Fecal microbiota transplants (FMT) may become a future possibility for children identified as high risk for autism or ADHD. FMT contains thousands of different species including fungi, bacteriophages, and archaea, transferring far more than a single probiotic capsule. FMT is considered experimental with concerns about transferring undetected pathogens, antibiotic-resistant organisms, and microbial traits linked to weight gain, obesity, autoimmune disorders, and allergies. Long-term effects are unknown. Despite risks, FMT is described as having unrivaled potential positive impact.
When traveling internationally to places like Turkey or Paris, Asian markets are recommended as reliable sources for fermented foods, particularly kimchi. Building variety is ideal, but kimchi serves as a good option when options are limited.
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The living diet is absolutely recommended for those with Hashimoto's or hypothyroidism. Hashimoto's and hypothyroidism often originate from a deficient immune system. Improving the immune system helps improve thyroid function. A compromised immune system can lead to a dysfunctional or suboptimal thyroid. In many cases, autoantibodies can attack the thyroid from a dysregulated immune system.
About 80% of immunity comes from the community of microbes inside the gut. The healthier the gut microbiome, the better the immune system is regulated and controlled. Get started on optimizing the microbiome by introducing small amounts of fermented foods. People often think they need to jump in and eat large amounts of ferments, but that is not necessary.
Eat small amounts as a garnish, such as a little mustard on a hot dog, or even less. These are bacteria being consumed for the living microbes, not as a side order like fries, potato, or broccoli. Start with small, diverse, very small amounts and gradually increase.
Human milk oligosaccharides (HMO) were discussed as potentially foundational for cultivating use. The response was that this is not familiar, but there is excitement about learning something new. The sound of it suggests a natural oligosaccharide that may be interesting. It is specifically human milk oligosaccharide, which may be a little hard to cultivate and harvest. Further study is planned, with a possible alpha live to discuss it.
Fermented foods can be consumed even with gut dysbiosis such as candida, H. pylori, or mold. Many people say no, but the recommendation is yes with a modifier: start small with very tiny amounts.
When introducing fermented foods with H. pylori and gut dysbiosis such as SIBO (small intestinal bacterial overgrowth), first get rid of the overgrowth, then fermented foods can be introduced. With gut dysbiosis, there are way too many of certain species, like having a million zebras instead of 50,000 on an African safari.
Introducing fermented foods can induce a Herxheimer effect with die-off if too much is introduced at once. Start small, introduce little tiny amounts, and gradually expand the variety of ferments and quantities.
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