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Your Gut's Clock: How Poop Speed Affects Health
22 Apr
Summary
- Gut transit time variation impacts gut microbiota composition.
- Slower transit times may lead to toxin release into the bloodstream.
- Less diverse microbiomes are linked to both fast and slow transit.
The speed at which food moves through your digestive system, known as gut transit time, is emerging as a significant factor in understanding gut health. A 2023 review in the journal Gut highlights that variations in this transit time can significantly influence the composition of gut bacteria, which in turn may be connected to various health conditions.
Research indicates that individuals with slower gut transit times often harbor more bacteria that feed on protein. Conversely, those with diets higher in carbohydrates and lower in fat tend to experience faster transit. Both excessively fast and slow transit times have been correlated with reduced microbiome diversity.
Furthermore, a separate 2025 study linked longer stool transit times to the release of toxins into the bloodstream. When stool remains in the gut for extended periods, beneficial fibers are fermented, leading to the production of toxins that can potentially harm organs. Diarrhea, representing rapid transit, has also been associated with higher levels of liver-damaging chemicals.
