The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Fiber tends to improve GI transit time because it adds bulk. So your GI system is basically a tube. And it has peristalsis, which is wavelike contractions that moves the food down through the tube. Well, if you have more bulk to the food, like with fiber, you can move it through a little bit better.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Insoluble fibers obviously do not dissolve in water. So think of an insoluble fiber as sort of roughage, right? Something that remains largely intact as it moves through your digestive system. Uh these are the ones that I talked about earlier. They're essentially there to bulk up stool mechanically stimulating the gut lining to release water and mucus to dilute irritants and toxins in the colon and speed up intestinal transit.