0

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Does this study mean white bread is healthier than brown?

Answered on August 19, 2014
Created June 28, 2013 at 5:31 PM

http://ajcn.nutrition.org/content/79/3/418.full

"Conclusion: The results show that fractional magnesium absorption from white-wheat bread is significantly impaired by the addition of phytic acid, in a dose-dependent manner, at amounts similar to those naturally present in whole-meal and brown bread".

006f2e9b763058ff2332681c206563e4

(252)

on June 30, 2013
at 03:18 PM

it's not normal for me; and if it's for you, the why you're on a paleo site?

Medium avatar

(10611)

on June 30, 2013
at 01:43 AM

Well it had me by the neck and I was going down for the count but things are better since my insulin resistance went away.

2e6e673ce3eb647407d260d4d57a731b

(1021)

on June 30, 2013
at 01:42 AM

paleo followers can be so fanatical they may as well blame bread for the holocaust

2e6e673ce3eb647407d260d4d57a731b

(1021)

on June 30, 2013
at 01:40 AM

bread murdered my father, and raped my mother!

32f5749fa6cf7adbeb0b0b031ba82b46

(41757)

on June 30, 2013
at 12:07 AM

Because eating bread is normal.

Medium avatar

(10611)

on June 29, 2013
at 06:16 PM

What does this remotely have to do with bread being healthy? Phytic acid is a paleo urban myth. The problem with bread is the high glycemic starch, which if overeaten leads to metabolic syndrome. Phytic acid and gluten are sideshows compared to the main effect.

Medium avatar

(10611)

on June 29, 2013
at 06:10 PM

A magnesium sorption study really needs to be done comparing oyster po'boy sandwiches, wheat vs white. Really needs to be done. Next question please.

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4 Answers

3
341abc7c4260f546147e1b380de7e866

on June 28, 2013
at 06:02 PM

First, one of the main tenets of paleo-nutrition, to the extent that there is such a thing, is that bread should not be a staple. If you're going to eat bread (or wheat/barley/rye in general), I would prioritize like this:

1) Beer 2) Sprouted and/or fermented whole grain 3) Unbleached, white

2
A0c49f398499246c623e6527e9dd5ca2

(548)

on June 29, 2013
at 05:46 PM

The study doesn't address whether whole or white wheat flour is superior. It only focuses on the effects of phytic acid on magnesium assumption and it shows that the ingestion is impaired.

However, applying the divisor 2.5 (ingestion decreased from 32.5mg to 32.5mg/2.5= 13mg in the case of whole-meal) to the magnesium content in whole wheat flour shows that the body still absorbs 55.2mg of magnesium, despite the phytic acid. This is still more than 2x the amount of magnesium in white wheat flour.

So looking at the magnesium absorption the study shows that whole wheat flour is indeed the better choice.

However, there are so many factors that this particular study didn't address.(e.g. the effect of phytic acid on the absorption of other nutrients (whole flour) or the long term ingestion of a food with a high glycemic index (white flour))

This study is insufficient to draw any conclusion on which flour to choose.

References: http://nutritiondata.self.com/facts/cereal-grains-and-pasta/5747/2 http://nutritiondata.self.com/facts/cereal-grains-and-pasta/5744/2 http://ajcn.nutrition.org/content/79/3/418.full

Medium avatar

(10611)

on June 29, 2013
at 06:10 PM

A magnesium sorption study really needs to be done comparing oyster po'boy sandwiches, wheat vs white. Really needs to be done. Next question please.

0
2e6e673ce3eb647407d260d4d57a731b

(1021)

on June 30, 2013
at 01:53 AM

wheat flour is always better, but you're supposed to make it into sourdough.

0
006f2e9b763058ff2332681c206563e4

on June 29, 2013
at 11:09 PM

Who cares? Why could you even consider eating bread at all?

2e6e673ce3eb647407d260d4d57a731b

(1021)

on June 30, 2013
at 01:40 AM

bread murdered my father, and raped my mother!

2e6e673ce3eb647407d260d4d57a731b

(1021)

on June 30, 2013
at 01:42 AM

paleo followers can be so fanatical they may as well blame bread for the holocaust

006f2e9b763058ff2332681c206563e4

(252)

on June 30, 2013
at 03:18 PM

it's not normal for me; and if it's for you, the why you're on a paleo site?

Medium avatar

(10611)

on June 30, 2013
at 01:43 AM

Well it had me by the neck and I was going down for the count but things are better since my insulin resistance went away.

32f5749fa6cf7adbeb0b0b031ba82b46

(41757)

on June 30, 2013
at 12:07 AM

Because eating bread is normal.

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