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-   -   Fiber Intake and Nutrient Absorption (http://forums.lylemcdonald.com//showthread.php?t=10452)

lylemcd 03-10-2011 03:19 PM

Fiber Intake and Nutrient Absorption
 
Copied from elsewhere

**
Ok, so this came up last week sometime and I knew I had numbers for it and I came across this in the folder of the never to be finished mondo opus book. I'm going to assume that I had some decent source (probably the Stipanuk book) for the numbers. Anyhow, there you go. Ultimately, it's a fairly small effect.

***
I should mention that very high fiber intakes can increase the amount of nutrients being lost to excretion. For example, higher fiber intakes may reduce fat absorption by about 3 percent, protein by maybe 5%. Itís been estimated that increasing fiber intake from 18 to 36 g/day would increase caloric losses by about 100 cal/day or so.

Essentially, the fiber prevents the enzymes from being able to reach the nutrients, and they simply pass through unabsorbed. This is another reason that high-fiber intakes can be useful while dieting: decreased caloric absorption. Of course, no athlete or bodybuilder wants decreased protein absorption so its sort of a mixed blessing.

josh_67 03-10-2011 05:12 PM

Quote:

Originally Posted by lylemcd (Post 130401)
Copied from elsewhere

**
Ok, so this came up last week sometime and I knew I had numbers for it and I came across this in the folder of the never to be finished mondo opus book. I'm going to assume that I had some decent source (probably the Stipanuk book) for the numbers. Anyhow, there you go. Ultimately, it's a fairly small effect.

***
I should mention that very high fiber intakes can increase the amount of nutrients being lost to excretion. For example, higher fiber intakes may reduce fat absorption by about 3 percent, protein by maybe 5%. It’s been estimated that increasing fiber intake from 18 to 36 g/day would increase caloric losses by about 100 cal/day or so.

Essentially, the fiber prevents the enzymes from being able to reach the nutrients, and they simply pass through unabsorbed. This is another reason that high-fiber intakes can be useful while dieting: decreased caloric absorption. Of course, no athlete or bodybuilder wants decreased protein absorption so its sort of a mixed blessing.

If one consumes Psyllium or other high fiber supp. inside of an hour or two of a protein based meal, would it be advisable to compensate with an additional 10 or so grams of protein just to be on the safe side?

Lily Pink 06-04-2011 03:06 PM

I have generally looked at fiber as medicinal and not nutritional, to help the body remove toxins. It is basically an anti-nutrient and cannot decipher between what is needed for the body and what is not so while it absorbs toxins it also takes precious vitamins, minerals and fats with it too. It forces the body to produce mucus and use water to expel the foreign substance. The body must replenish everything when we ingest fiber (extra vitamins, minerals, fats, water, electrolytes, etc...) and is extremely taxing on the body for the body cannot rest and heal/build muscles until the fiber is eliminated. It can destroy the delicate villi in the intestines and actually cause tears in any part of the digestive tract. it causes gas, bloating and intestinal distress while it rapes the body of everything it needs to survive. I can not see any reason to take fiber above the occasional seasonal fruit/veg unless you have a bout of diarrhea (a sign that the body is trying to rid itself of some toxin). Your thoughts?

lylemcd 06-06-2011 07:51 AM

Quote:

Originally Posted by Lily Pink (Post 140395)
I have generally looked at fiber as medicinal and not nutritional, to help the body remove toxins. It is basically an anti-nutrient and cannot decipher between what is needed for the body and what is not so while it absorbs toxins it also takes precious vitamins, minerals and fats with it too. It forces the body to produce mucus and use water to expel the foreign substance. The body must replenish everything when we ingest fiber (extra vitamins, minerals, fats, water, electrolytes, etc...) and is extremely taxing on the body for the body cannot rest and heal/build muscles until the fiber is eliminated. It can destroy the delicate villi in the intestines and actually cause tears in any part of the digestive tract. it causes gas, bloating and intestinal distress while it rapes the body of everything it needs to survive. I can not see any reason to take fiber above the occasional seasonal fruit/veg unless you have a bout of diarrhea (a sign that the body is trying to rid itself of some toxin). Your thoughts?

Yeah, everything you wrote above is wrong. Those are my thoughts. I also think that you're a post bot looking for the term fiber. Please PM me to prove me wrong.

Cubanation 02-14-2012 09:09 AM

Quote:

Originally Posted by lylemcd (Post 140555)
Yeah, everything you wrote above is wrong. Those are my thoughts. I also think that you're a post bot looking for the term fiber. Please PM me to prove me wrong.

Damn Lyle, haven't been on here for a while, still fat. Sadly. But I'm back, and how I did miss your classic replies. Keep it up.

That said, I'm looking into supplementing with flavorless Metamucil. Me thinks.

Stapedius 03-03-2012 03:23 PM

Quote:

Originally Posted by Cubanation (Post 167647)
Damn Lyle, haven't been on here for a while, still fat. Sadly. But I'm back, and how I did miss your classic replies. Keep it up.

That said, I'm looking into supplementing with flavorless Metamucil. Me thinks.

I supplement with metamucil because it makes defecation an other-worldly experience.

gxxr1130 06-20-2012 12:39 PM

Quote:

Originally Posted by Stapedius (Post 169766)
I supplement with metamucil because it makes defecation an other-worldly experience.

I couldn't agree more or laugh harder

Todd Lincoln 06-21-2012 12:03 PM

I currently take 6g of psyllium twice a day for general health. I just add a teaspoon of Konsyl to a protein shake for each serving. Is there specific timing for fiber consumption that is considered optimal? I take some vitamins and fish oil and am unsure if absorption would be greatly effected to the degree that I should just consume the fiber supplement in between meals and not with food and vitamins.

gxxr1130 06-22-2012 04:36 AM

Quote:

Originally Posted by Todd Lincoln (Post 186049)
I currently take 6g of psyllium twice a day for general health. I just add a teaspoon of Konsyl to a protein shake for each serving. Is there specific timing for fiber consumption that is considered optimal? I take some vitamins and fish oil and am unsure if absorption would be greatly effected to the degree that I should just consume the fiber supplement in between meals and not with food and vitamins.

Excellent question. I take 5g a day myself. That makes sense to take the fiber separately from EFAs or Vitamins if it does negatively affect absorption. I might try taking it prior to meals to reduce hunger. It seems that Glucomannan is combined with Hoodia for this effect in some supplements. I'm not liking the EC stack, so this could be a stimulant free way for me to reduce hunger.

scottyw 06-22-2012 05:49 AM

I had some bloodwork done recently... I had low iron... Hemoglobin n red cells were fine, but iron was low. Im a regular blood donor, so this can contribute to the low iron. When donating, I have never been turned away because of low iron. Just in the serum iron it showed up.

I did some reading and found that high fiber can also contribute to low iron levels. I do track my iron via MFP, and I usually eat upwards of 50g per day, I was supplementing metamucil too. Fiber I also tracked in MFP Also through reading the damn internet, like anything else, too much fiber can lead to other mineral and vitamin deficiencys. I have decided to cut the fiber back to the reccommended 30-35g per day, and not donate, and see what happens in a couple of months with the iron, and the other minerals.

So it is def a mixed blessing when it comes to nutrition. Number 2's have been wonderful I just have to add.


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