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Dr Will Bulsiewicz says measurable microbiome changes can begin within 24 hours of dietary change

Feel Better, Live More with Dr Rangan Chatterjee · Your Gut Needs More Than Probiotics! | Dr Will Bulsiewicz · September 9, 2026
Dr Will Bulsiewicz says measurable microbiome changes can begin within 24 hours of dietary change
Feel Better, Live More with Dr Rangan Chatterjee
Feel Better, Live More with Dr Rangan Chatterjee
Your Gut Needs More Than Probiotics! | Dr Will Bulsiewicz
"Literally by tomorrow, literally by tomorrow, there's already changes that are underway. Now, are we installing a brand new gut microbiome? Are we completely transforming it in 24 hours? Absolutely not."
Gastroenterologist Dr Will Bulsiewicz says the gut microbiome can show detectable changes as soon as the next day after changing what you eat, while stressing this does not mean a complete transformation in 24 hours. He points to a 2014 Nature study (lead author Lawrence David, Duke University) that tracked daily microbiome measurements during five-day animal-only and plant-only dietary patterns.
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Feel Better, Live More with Dr Rangan Chatterjee
Feel Better, Live More with Dr Rangan Chatterjee

Your Gut Needs More Than Probiotics! | Dr Will Bulsiewicz

September 9, 2026 · 1h 55m · 3 Egleze moments
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