Posted on 05/01/2022 2:03:58 PM PDT by ConservativeMind
The health benefits of dietary fiber vary across individuals and may depend on the specific type of fiber and the dose consumed, researchers report.
"Our results demonstrate that the physiological, microbial, and molecular effects of individual fibers differ substantially," says senior study author Michael Snyder.
Chemically, fibers are diverse in length, branching, solubility, charge, and other properties. "They are studied as complex mixtures from their plant source," Snyder says. "There is a need for determining the effects of individual fibers on the microbiome and for establishing associated health biomarkers, ideally by testing different fibers on the same individuals."
To address this, Snyder investigated the physiological effects of dietary supplementation with two common and structurally distinct soluble fibers: arabinoxylan (AX), which is common in whole grains, and long-chain inulin (LCI), which is found in onions, chicory root, and Jerusalem artichokes.
The participants consumed 10 grams of fiber per day during the first week, 20 grams per day during the second week, and 30 grams per day during the third week. The results revealed fiber- and often dose-dependent microbial and systemic responses. On average, AX consumption was associated with a significant reduction in low-density lipoprotein (LDL), known as the bad cholesterol, and an increase in bile acids, which may be contributing to the cholesterol reduction. Yet individual responses varied, and some participants saw little to no change in cholesterol levels.
Meanwhile, LCI was associated with a modest decrease in inflammation markers and an increase in the abundance of Bifidobacterium—a generally beneficial type of gut microbe known to produce healthy short-chain fatty acids. But at the highest dose, there was an increase in inflammation and levels of a liver enzyme called alanine aminotransferase, suggesting that too much of this fiber may be harmful. Again, these potentially negative responses were variable across the participants.
(Excerpt) Read more at medicalxpress.com ...
https://www.youtube.com/watch?v=Ku42Iszh9KM
“Hmmmm, Colon Blow. Sounds delicious. But is it really higher in fiber than my oat bran cereal?”
I haven’t watched that video, but I have been saving a several-year old study that describes how eliminating all fiber relieved chronic constipation in those with no apparent cause.
I found it a rather funny thing to read and completely opposite what we have been told, yet, it resolved all their constipation.
She mentions it in the video IIRC. I’ on a near carnivore diet. I probably average a gram a day of fiber. Certainly no constipation. As a rule, I think eating SOME veggies and fruit that isn’t hyper-sweet is a good thing. But I don’t like them and don’t miss them. I can’t imagine eating the recommended 30+ grams of fiber daily.
I also have issues with “low-density lipoprotein (LDL), known as the bad cholesterol”. LDL can be dangerous or can be helpful, depending on what sort of LDL one has. Total cholesterol is another overblown figure.
“High-fiber diets reduce the risk of heart attack, stroke, and cardiovascular disease. They act by lowering cholesterol ...”
There is a ton of garbage in that statement. The sweet spot for total cholesterol seems to be 200-250...based on total mortality. Doesn’t do much good if one avoids a stroke and is killed by cancer instead. In fact, if I’m going to die, I think I’d prefer a heart attack. But “reducing cholesterol” - by itself - is a meaningless thing to do. Our blood chemistry is way ore complex than that and these simplistic ideas are SOOOO 1960s.
Interesting.
.
Bkmk
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