My gold standard is eating beets for the evening meal. They usually turn everything red by the morning drop, so 12-14 hours.
3 hours ago — I ate muffins that turned my poop blue, and learned my 'gut transit time' is up to 51 hours. Hilary Brueck. in 22 hours.
I Turned My Poop Blue to Check My Gut Health, and You Can ...
https://www.insider.com › Health › Lifestyle3 hours ago — I ate muffins that turned my poop blue, and learned my 'gut transit time' is up to 51 hours. Hilary Brueck. in 22 hours.