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Nutrition Basics

Gut Microbiome

The 100 trillion microorganisms living in your gut.

Definition

The gut microbiome is the community of microorganisms (bacteria, viruses, fungi) inhabiting the digestive tract. It counts about 100 trillion microorganisms.

How it works

A balanced microbiome ferments fibers into short-chain fatty acids, synthesizes vitamins (K, B12), modulates the immune system and protects against pathogens. Dysbiosis is associated with obesity, inflammatory diseases and mood disorders via the gut-brain axis.

Role

Ferment fibers, synthesize vitamins, regulate immunity, protect the intestinal lining.

Examples

  • Lactobacillus, Bifidobacterium (beneficial)
  • Fermented foods: yogurt, kefir, kimchi, sauerkraut

Recommendations

Feed the microbiome with varied fiber (25-30g/day), fermented foods, and limit unnecessary antibiotics.

Key takeaway

The microbiome is a full-fledged organ — feeding it correctly is one of the best health investments.

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