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Blog Gastrointestinal health

Lactobacillus probiotics: the complete guide to balancing your gut microbiota

11/11/2026

Gasseri, rhamnosus, reuteri, acidophilus… The Lactobacillus family comprises probiotics with different characteristics. Find out how to choose the strains best suited to your needs.

📌︎ Key takeaways
  • ✓Lactobacillus, or lactobacilli, are lactic acid bacteria found in the gut and intimate flora.
  • ✓Their biological effects depend not only on the species but also on the strain.
  • ✓Lactobacillus gasseri has been extensively studied in relation to metabolism and body composition.
  • ✓Lactobacillus rhamnosus GG (LGG) is one of the best-documented strains in terms of digestive comfort and the gut barrier.
  • ✓Lactobacillus reuteri is the subject of research in several areas, including lipid metabolism.
  • ✓CFU, viability and protection against gastric acidity are key quality criteria.

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Gastrointestinal health

Probiotics and the gut: understanding and optimising your microbiota

Probiotics and the gut have a complex relationship. Far from being simply ‘good bacteria’, these microorganisms interact with a unique ecosystem: the microbiota. Find out how to better understand and maintain it.

📌︎ Key takeaways
  • ✓The gut microbiota comprises between 1,000 and 100,000 billion microorganisms, mainly concentrated in the colon.
  • ✓Probiotics do not establish a long-term presence in the gut, which is why it is beneficial to take them regularly or repeat courses as needed.
  • ✓The properties of probiotics depend closely on the strains used.
  • ✓CFU dosage, freeze-drying and gastro-resistant coating are key criteria for choosing the right supplement.
  • ✓Prebiotics, such as inulin and FOS, act as ‘food’ for certain gut bacteria and optimise their colonisation and activity.

01/10/2026
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