Robert Lustig: Fiber acts as a gel and prevent the transport of glucose and fructose to portal vein
Short transcript excerpt from a YouTube video (uploaded July 17, 2024) in which a speaker explains that when carbohydrates are consumed as part of fiber-rich "real food," soluble and insoluble fiber form a gel-like lattice in the intestine that slows/prevents transport of glucose, fructose, sucrose and simple starches from the intestinal lumen into the portal vein. The speaker claims these carbohydrates are instead metabolized by the gut microbiome farther down the intestine, so the liver does not see them and the host does not absorb those calories.
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