Coffee

Marshall Price · Joined: 17 Aug 2007 Posts: 60

It's been known for a long time that coffee interferes with magnesium
and thiamine absorption.

What other nutrients is it likely to interfere with?

--
Marshall Price of Miami
Known to Yahoo as d021317c

Archived from group: sci>med>nutrition

Mr-Natural-Health · Joined: 14 Feb 2008 Posts: 21

On Feb 16, 6:33 am, Marshall Price wrote:
> It's been known for a long time that coffee interferes with magnesium
> and thiamine absorption.
>
> What other nutrients is it likely to interfere with?
>
> --
> Marshall Price of Miami
> Known to Yahoo as d021317c

Fe - iron: Polyphenols present in coffee and tea inhibited iron
absorption in a dose-dependent manner.

Zijp IM, Korver O, Tijburg LB.
Effect of tea and other dietary factors on iron absorption.
Crit Rev Food Sci Nutr. 2000 Sep;40(5):371-98. Review.
PMID: 11029010

Mr-Natural-Health · Joined: 14 Feb 2008 Posts: 21

> On Feb 16, 6:33 am, Marshall Price wrote:
>
> > It's been known for a long time that coffee interferes with magnesium
> > and thiamine absorption.
>
> > What other nutrients is it likely to interfere with?
>
> Fe - iron: Polyphenols present in coffee and tea inhibited iron
> absorption in a dose-dependent manner.
>
> Zijp IM, Korver O, Tijburg LB.
> Effect of tea and other dietary factors on iron absorption.
> Crit Rev Food Sci Nutr. 2000 Sep;40(5):371-98. Review.
> PMID: 11029010

And, I will add Zinc.

Van Dyck K, Tas S, Robberecht H, Deelstra H.
The influence of different food components on the in vitro
availability of iron, zinc and calcium from a composed meal.
Int J Food Sci Nutr. 1996 Nov;47(6):499-506.
PMID: 8933204

Marshall Price · Joined: 17 Aug 2007 Posts: 60

Mr-Natural-Health wrote:
>> On Feb 16, 6:33 am, Marshall Price wrote:
>>
>>> It's been known for a long time that coffee interferes with magnesium
>>> and thiamine absorption.
>>> What other nutrients is it likely to interfere with?
>> Fe - iron: Polyphenols present in coffee and tea inhibited iron
>> absorption in a dose-dependent manner.
>>
>> Zijp IM, Korver O, Tijburg LB.
>> Effect of tea and other dietary factors on iron absorption.
>> Crit Rev Food Sci Nutr. 2000 Sep;40(5):371-98. Review.
>> PMID: 11029010
>
> And, I will add Zinc.
>
> Van Dyck K, Tas S, Robberecht H, Deelstra H.
> The influence of different food components on the in vitro
> availability of iron, zinc and calcium from a composed meal.
> Int J Food Sci Nutr. 1996 Nov;47(6):499-506.
> PMID: 8933204

I'm having a bit of trouble understanding what polyphenols are.
According to The American Heritage Science Dictionary (
http://www.thefreedictionary.com/polyphenol ), they contain two or more
benzene rings, but according to Merriam-Webster (
http://aolsvc.merriam-webster.aol.com/dictionary/polyphenol ), they are
polyhydroxy phenols! Does "poly" refer to the presence of more than one
phenol group, or to more than one hydroxyl group?

Incidentally, according to an article in the United Nations University
Bulletin ( http://www.unu.edu/Unupress/food/V191e/ch02.htm ), vitamin A
reduces the inhibition, at least in the case of iron.

Since the absorption of various divalent cations is mediated by
different mechanisms (mucosal ferritin, metallothionein, calcium-binding
protein...), I wonder whether polyphenols, phytates, and oxalates all
work similarly.

Is there something about thiamine which makes it uniquely susceptible
among vitamins to polyphenol binding?

(I don't have access to journals, but am most eager to find some
publicly accessible internet resources on these subjects.)

--
Marshall Price of Miami
Known to Yahoo as d021317c

Mr-Natural-Health · Joined: 14 Feb 2008 Posts: 21

On Feb 17, 12:51 am, Marshall Price wrote:
> Mr-Natural-Health wrote:
> >> On Feb 16, 6:33 am, Marshall Price wrote:
>
> >>> It's been known for a long time that coffee interferes with magnesium
> >>> and thiamine absorption.
> >>> What other nutrients is it likely to interfere with?
> >> Fe - iron: Polyphenols present in coffee and tea inhibited iron
> >> absorption in a dose-dependent manner.
>
> >> Zijp IM, Korver O, Tijburg LB.
> >> Effect of tea and other dietary factors on iron absorption.
> >> Crit Rev Food Sci Nutr. 2000 Sep;40(5):371-98. Review.
> >> PMID: 11029010
>
> > And, I will add Zinc.
>
> > Van Dyck K, Tas S, Robberecht H, Deelstra H.
> > The influence of different food components on the in vitro
> > availability of iron, zinc and calcium from a composed meal.
> > Int J Food Sci Nutr. 1996 Nov;47(6):499-506.
> > PMID: 8933204
>
> I'm having a bit of trouble understanding what polyphenols are.
> According to The American Heritage Science Dictionary (http://www.thefreedictionary.com/polyphenol), they contain two or more
> benzene rings, but according to Merriam-Webster (http://aolsvc.merriam-webster.aol.com/dictionary/polyphenol), they are
> polyhydroxy phenols! Does "poly" refer to the presence of more than one
> phenol group, or to more than one hydroxyl group?
>

http://www.beloit.edu/~nutritio/polyphenols.htm

Which was located with ...

polyphenols OR polyhydroxy "phenol group" OR "hydroxyl group"
site:.edu

http://www.google.com/search?hl=en&newwindow=1&safe=off&rlz=1B2GGGL_enUS204US205&q=polyphenols+OR+polyhydroxy+%22phenol+group%22+OR+%22hydroxyl+group%22+site%3A.edu&btnG=Search

Marshall Price · Joined: 17 Aug 2007 Posts: 60

Mr-Natural-Health wrote:
> On Feb 17, 12:51 am, Marshall Price wrote:
>> Mr-Natural-Health wrote:
>>>> On Feb 16, 6:33 am, Marshall Price wrote:
>>>>> It's been known for a long time that coffee interferes with magnesium
>>>>> and thiamine absorption.
>>>>> What other nutrients is it likely to interfere with?
>>>> Fe - iron: Polyphenols present in coffee and tea inhibited iron
>>>> absorption in a dose-dependent manner.
>>>> Zijp IM, Korver O, Tijburg LB.
>>>> Effect of tea and other dietary factors on iron absorption.
>>>> Crit Rev Food Sci Nutr. 2000 Sep;40(5):371-98. Review.
>>>> PMID: 11029010
>>> And, I will add Zinc.
>>> Van Dyck K, Tas S, Robberecht H, Deelstra H.
>>> The influence of different food components on the in vitro
>>> availability of iron, zinc and calcium from a composed meal.
>>> Int J Food Sci Nutr. 1996 Nov;47(6):499-506.
>>> PMID: 8933204
>> I'm having a bit of trouble understanding what polyphenols are.
>> According to The American Heritage Science Dictionary (http://www.thefreedictionary.com/polyphenol), they contain two or more
>> benzene rings, but according to Merriam-Webster (http://aolsvc.merriam-webster.aol.com/dictionary/polyphenol), they are
>> polyhydroxy phenols! Does "poly" refer to the presence of more than one
>> phenol group, or to more than one hydroxyl group?
>>
>
> http://www.beloit.edu/~nutritio/polyphenols.htm
>
> Which was located with ...
>
> polyphenols OR polyhydroxy "phenol group" OR "hydroxyl group"
> site:.edu
>
> http://www.google.com/search?hl=en&newwindow=1&safe=off&rlz=1B2GGGL_enUS204US205&q=polyphenols+OR+polyhydroxy+%22phenol+group%22+OR+%22hydroxyl+group%22+site%3A.edu&btnG=Search

Unfortunately, this is the sort of discussion I find everywhere, but not
a definition. It addresses polyphenols as a family of compounds with
certain traits and discusses the pros and cons of consuming them.

What I seek is a definition which, given a molecular structure,
indicates clearly how to identify it as a polyphenol.

Is American Heritage right (in considering the number of benzene rings),
or Merriam-Webster (in considering the number of hydroxyl moieties)?

--
Marshall Price of Miami
Known to Yahoo as d021317c

Mr-Natural-Health · Joined: 14 Feb 2008 Posts: 21

On Feb 24, 11:01 pm, Marshall Price wrote:
> Mr-Natural-Health wrote:
> > On Feb 17, 12:51 am, Marshall Price wrote:
> >> Mr-Natural-Health wrote:
> >>>> On Feb 16, 6:33 am, Marshall Price wrote:
> >>>>> It's been known for a long time that coffee interferes with magnesium
> >>>>> and thiamine absorption.
> >>>>> What other nutrients is it likely to interfere with?
> >>>> Fe - iron: Polyphenols present in coffee and tea inhibited iron
> >>>> absorption in a dose-dependent manner.
> >>>> Zijp IM, Korver O, Tijburg LB.
> >>>> Effect of tea and other dietary factors on iron absorption.
> >>>> Crit Rev Food Sci Nutr. 2000 Sep;40(5):371-98. Review.
> >>>> PMID: 11029010
> >>> And, I will add Zinc.
> >>> Van Dyck K, Tas S, Robberecht H, Deelstra H.
> >>> The influence of different food components on the in vitro
> >>> availability of iron, zinc and calcium from a composed meal.
> >>> Int J Food Sci Nutr. 1996 Nov;47(6):499-506.
> >>> PMID: 8933204
> >> I'm having a bit of trouble understanding what polyphenols are.
> >> According to The American Heritage Science Dictionary (http://www.thefreedictionary.com/polyphenol), they contain two or more
> >> benzene rings, but according to Merriam-Webster (http://aolsvc.merriam-webster.aol.com/dictionary/polyphenol), they are
> >> polyhydroxy phenols! Does "poly" refer to the presence of more than one
> >> phenol group, or to more than one hydroxyl group?
>
> >http://www.beloit.edu/~nutritio/polyphenols.htm
>
> > Which was located with ...
>
> > polyphenols OR polyhydroxy "phenol group" OR "hydroxyl group"
> > site:.edu
>
> >http://www.google.com/search?hl=en&newwindow=1&safe=off&rlz=1B2GGGL_e...
>
> What I seek is a definition which, given a molecular structure,
> indicates clearly how to identify it as a polyphenol.

http://answers.yahoo.com/question/index?qid=1006042729758

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