Fast-5 Diet and Lifestyle: [fast5] Re: Interesting news item on tea and coffee

Tuesday, December 15, 2009

[fast5] Re: Interesting news item on tea and coffee

So, my coffee and tea intake is a good thing :)

I don't eat many things with flour in them... maybe one piece of low carb
bread a wk.. if that...

Helen

--- In fast5@yahoogroups.com, Heather Twist <HeatherTwist@...> wrote:
>
> Tea and coffee both interfere with iron absorption too. High levels of
> ferritin are very much associated with T2 diabetes, and giving blood
> has shown to be protective for T2. Given the high levels of
> iron-supplementation of our food, we NEED to drink tea or coffee with
> them!
>
> http://www.clinchem.org/cgi/content/full/51/7/1201
>
> Frequent blood donors (2–10 donations) had increased insulin
> sensitivity [3.42 (1.03) vs 2.45 (1.2) x 10–4 · min–1 · mIU/L; P =
> 0.04], decreased insulin secretion [186 (82) vs 401.7 (254) mIU/L ·
> min; P <0.0001], and significantly lower iron stores [serum ferritin,
> 101.5 (74) vs 162 (100) µg/L; P = 0.017] than nondonors, but the 2
> groups had similar blood hematocrits and blood hemoglobin
> concentrations.
>
> http://www.feinberg.northwestern.edu/nutrition/factsheets/iron.html
>
> Tannic acid in coffee and tea also adversely affects iron absorption.
> Consumption of coffee or tea one hour before or after consumption of a
> nonheme iron dietary source can reduce absorption of this mineral by
> as much as 40%.
>
>
> Incidentally, the foods with the highest iron-supplementation are the
> *carb* foods, which I think is a confounding factor for diabetics. One
> serving of Chex cereal, for instance, has a whole day's worth of iron
> in one serving. Most "white flour" is "enriched", and even the rice,
> so even homemade food is loaded with iron.
>
>
>
> On Tue, Dec 15, 2009 at 6:25 AM, dnn8350 <david@...> wrote:
> > Some new data on the apparently beneficial influence of tea and coffee on type 2 diabetes:
> >
> > http://news.bbc.co.uk/1/hi/health/8411605.stm
> >
> > I wonder how to take this, given the popularity of tea-drinking in the UK, and coffee-drinking in the US. It seems to imply that type 2 diabetes would be even commoner in the population if less of these beverages were drunk.
> >
> > David
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
> --
> Heather Twist
> http://eatingoffthefoodgrid.blogspot.com/
>