How does the Gut Microbiota vary across One’s Lifespan?


How does the Gut Microbiota vary across One’s Lifespan?

Baby/toddler: Dominance of bacteroidetes (Bacteroidetes are symbiotic species highly adjusted to the GI tract, and perform metabolic conversions such as degradation of proteins or complex sugar polymers.)

Adult: Stable composition

Elderly: Lower diversity and potential increase of harmful bacterial groups


Influencing factors:
– Delivery mode (vaginal vs C-section)
– Breastfeeding vs formula
– Term vs preterm

– Diet
– Lifestyle
– Medications (e.g., antibiotics)
– Exercise

– Decline of physiological functions
– Diet
– Lifestyle
– Medications (e.g., antibiotics)

Here’s the impact of common dietary patterns to gut microbiota.


1. National Institutes of Health (NIH)
2. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

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