Infant gut microbes have their own circadian rhythm, and diet has little impact on how the microbiome assembles

Infant gut microbiomes oscillate with a circadian rhythm, even when they are cultivated outside of the body. Researchers report that the rhythm is detectable as early as 2 weeks after birth but becomes more pronounced with age. The finding comes from a randomized controlled trial that also showed that diet has less impact on the development and composition of the infant microbiome than previously thought.