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Will Bulsiewicz MD MSCI@theguthealthmdInstagram

Your gut transit time tells more about your health than just what you eat! It can predict your microbiome

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what it claims

Intestinal transit time is a key indicator of overall health, capable of predicting microbiome diversity, visceral fat, and cardiovascular risk.

mixed

Intestinal transit time, or passage time, is effectively a recognized marker in gastroenterology for assessing digestive function.

noli's read

Intestinal transit time, or passage time, is effectively a recognized marker in gastroenterology for assessing digestive function. A study published in 'Nature Microbiology' (meta-analysis/observational) suggests that transit time is strongly correlated with microbiome composition and the production of beneficial metabolites. There is also observational evidence linking very slow transit to an increased risk of metabolic diseases and visceral fat storage. However, claiming that this indicator alone can 'predict' cardiovascular risk is an extrapolation. While efficient digestion is correlated with better metabolic health, cardiovascular risk is a complex multifactorial phenomenon that cannot be reduced to transit speed alone. The advice is scientifically based on correlation, but the creator amplifies the predictive diagnostic value of this tool to make it a universal indicator.

the sources

No named source held this one up — that absence is part of the verdict.

Claimed by Will Bulsiewicz MD MSCI. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

Will Bulsiewicz MD MSCI in the Register46 claims graded · solidity 87/100See their record →

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