The microbiota in infants and children

The newborn baby establishes its gut bacteria and intestinal microbiota from birth and during the first three years of life. Directly after birth the newborn baby is almost sterile but very soon bacteria start to colonize every part of the body – the skin, the mouth and most importantly the gastrointestinal tract. The number and diversity of bacteria continue to increase until the age of three. At that time the microbiota resembles the composition of an adult and then, more or less, remains the same throughout life.

The interest in gut bacteria and the infant’s microbiota has exploded in recent years and research has shown that the infant microbiota plays an essential role in human health. A diverse microbiota may help the infant to optimize the development of the gastrointestinal tract and contribute to better health later in life.

The microbiota contributes to:

  • Enforced gut barrier
  • Improved digestion
  • Improved gut motility
  • Development of the immune system


One of the world’s most studies probiotics in children

BioGaia’s probiotic products with Limosilactobacillus reuteri (formerly known as Lactobacillus reuteri) Protectis (L. reuteri DSM 17938) are among the most scientifically well-documented probiotics for children with regard to both efficacy and safety. BioGaia’s probiotic strain L reuteri Protectis has been used in 117 clinical studies in 14,200 children, from newborn to 18 years old (Dec 2022).



As many parents know, colic is far more than just crying. The clinical term refers to a condition of inconsolable crying, fussing and irritability in an otherwise healthy baby during the first three months of life. Read more


Functional abdominal pain

The exact cause of Functional abdominal pain is still unclear, but it seems to be an interplay between genetic, physiological and psychological factors. Moreover, our brain and gut are connected by an extensive network of neurons and a highway of chemicals and hormones that constantly communicate. Read more


Diarrhea in children

Did you know that diarrhea is a side effect of antibiotic therapy? Apart from diarrhea symptoms include nausea, vomiting, bloating and stomach pain. Read more


Functional constipation in children

The problems often start when changing from breast milk to formula or with the introduction of solid food. Other frequent onset periods are during toilet training, between two and four years of age, or when the child starts school. Read more



Regurgitation, also known as spitting up, is very common in infants and often occurs after a feeding. Read more


Children and infections

Most of the immune system is located in the gut and by taking care of your child’s stomach you can help him or her to stay healthy and strong. A healthy microbiota reduces the risk of infections and offers an overall better quality of life. Read more