Die Entwicklung unseres Mikrobioms | Ernährungsexpertin Dagmar von Cramm erklärt

Scientific concepts & nature/health phenomena

Microbiome / microbiota: definition and scope

• Microorganisms colonize the skin, mucous membranes, and the digestive tract.
• “Microbiome” is broader than the older term “flora” and includes:
  • the microbiota itself
  • its metabolic products
  • the surrounding environment/conditions (“microcosm” concept)
• The microbiome influences health from early life, including food metabolism.
• It is shaped by genetics, epigenetics, and nutrition.

Development of the microbiome: pregnancy to childhood

Before birth (embryo/fetus)

• Microbes are described as being influenced first by genetic predispositions.
• Maternal diet is said to affect the fetus through amniotic fluid taste exposure, with examples including:
  • cinnamon/cumin/curry
  • vanilla
  • garlic
  • “strong flavors”
• Maternal factors cited include:
  • overall health
  • healthy weight
  • non-smoking
  • no alcohol
• Psychological stress in the mother is claimed to be transmitted to the unborn child (stress/violence → effects on the fetus).

During/around birth

• Mode of delivery is described as a crucial determinant:
  • Vaginal birth: the infant’s microbiome resembles the mother’s microbiota.
  • Cesarean section (C-section): the infant’s microbiome resembles the hospital environment, the mother’s skin, and hospital staff, with staphylococci highlighted.
• Reported persistence: differences may remain even ~4 months after birth.
• Infection risk: C-section babies are described as more susceptible to infections, including the claim that 82% of hospital infections occur in C-section babies.
• Antibiotics: regardless of delivery mode, antibiotics are said to “kill the entire microbiota” initially, requiring the microbiome to restart—therefore antibiotic use should be minimized in the first year if possible.

After birth

• For C-section babies, colonization with some microbes is said to begin after ~6 months, especially through breastfeeding.
• Breast milk is portrayed as supporting intestinal maturation and immune development.

Breast milk components and “prebiotics”

• Breast milk contains human milk oligosaccharides (subtitles referenced terms that reflect the same concept: milk oligosaccharides).
• These oligosaccharides act as prebiotics:
  • indigestible dietary fiber for humans
  • reach the gut and serve as food for beneficial bacteria
  • help reduce pathogen colonization and intestinal infections
  • support a protective gut layer
  • lower inflammatory response
• Connection to neurodevelopment:
  • A “gut–brain axis” / “brain–brain axis” is mentioned.
  • Verifiable data is said to be limited, but hypotheses suggest gut microbes influence mental development.
  • Solid foods are said to trigger central nervous system maturation; later, taste/smell preferences develop during complementary feeding.

Window of opportunity / malleability of the infant microbiome

• Early-life microbiomes are described as highly susceptible to diet and environment.
• A study described in the subtitles:
  • Researchers visited the Yanomami (Brazil).
  • Adults reportedly maintained their microbiome more than children.
  • After 3 weeks, children reportedly showed a microbiome similar to Yanomami children, while adults changed less.
• A susceptibility timeframe is stated as approximately 6–26 years, though emphasis is placed on early childhood and primary school age.

Screening and obesity risk (as stated)

• Children who are “never screened” are described as having a 2–3% increased risk of obesity.
• The subtitles also claim malnutrition/infections develop more quickly (the meaning of “screened” is unclear in the provided text).

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Diet/nutrition factors mentioned (methodology / bullet points)

How to build/support the microbiota (as described)

• Breastfeeding

  • Promote microbiota, especially in the first 4–6 months
  • Continue through the first year (as stated)

• Complementary foods

  • Begin small amounts around the end of month 5 / beginning of month 6
  • Small amounts are said to reduce allergy risk

• Fiber-rich plant foods (examples)

  • Soluble fiber → broken down into short-chain fatty acids (SCFAs); reduces oxygen/oxidative stress in the gut (as stated)
  • Polyphenols from vegetables, fruits, and whole grains (bioactive substances)
  • Examples mentioned for gut support:
    • artichokes, asparagus
    • onions
    • carrots, parsnips
  • Fibers/lipids mentioned as supporting gut bacteria:
    • “linoleic acid” (as stated) in asparagus/artichokes and also parsnips
  • “Insulin” is mentioned as a microbiota-friendly fiber helping prevent constipation (likely referring to inulin, though the subtitle says “insulin”)

• Prebiotics / probiotics

  • Prebiotics in:
    • yogurt and other fermented foods
    • sourdough bread
  • Probiotics in:
    • probiotic yogurt
  • Other fiber sources mentioned:
    • legumes, nuts, seeds
    • unpeeled almonds
    • psyllium husks
    • whole grains (e.g., oat flakes)
    • flaxseeds

• Hydration with fiber

  • Pair whole grains/fiber with plenty of fluids so fiber swells properly and avoids constipation

• Exercise

  • Exercise stimulates peristalsis
  • Microbes “like” peristalsis/activity (as stated)
  • Starts during pregnancy (walking, yoga)
  • Also beneficial after birth

• Sleep and meal structure

  • Adequate sleep
  • Regular meal structure

What harms the microbiota (as described)

• High salt: overwhelms infant microbiota and kills helpful bacteria
• Additives: emulsifiers and thickeners (mentioned)
• Sweeteners in processed foods: may deplete microbiome (described as not fully proven)
• Too much sugar:
  • shifts growth toward harmful gut bacteria
  • weakens protection against pathogens
• Dietary context affecting metabolites:
  • animal proteins and unsaturated fatty acids metabolized when nutrients are low may produce “not good” breakdown products (as stated)

Dietary pattern recommended for children

• Prefer a Mediterranean-style diet (not vegan):
  • many plant-based foods
  • vegetables and whole grains
  • moderate amounts of fish, dairy, and meat
• Quantities (as stated):
  • maximum of two portions of fruit/day
  • three portions of vegetables/day, with at least two cooked
• Grains
  • choose whole grains, not refined grain products
• Legumes
  • introduce mainly in the second year of life
  • earlier attempts: small amounts may cause bloating
  • cook legumes very soft and possibly puree for easier digestion
• Sugar
  • lower sugar intake
  • avoid sugary drinks and juices; juice only as a rare treat
• Processed foods
  • minimize processed foods
• After antibiotics
  • prebiotic intake supports growth of probiotic-like beneficial bacteria
  • taking probiotic bacteria after antibiotic therapy is described as beneficial

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Researchers / sources featured (from the subtitles)

• No specific named researchers or institutions are explicitly credited in the provided subtitles.
• The only clearly identified study context:
  • Yanomami Indians (Brazil) (research team visiting and conducting the described 3-week dietary exposure)
• The speaker (source) is:
  • Dagmar von Cramm (nutrition expert; video host/speaker)