Re: Aeropress reviewed...

Dear David,

You accuse me of not reading the material, yet if you had read the
Science News article yourself you would have seen that the article
discussed more than one aspect of coffee and health. The osteoporosis
reference was related to the osteoporosis discussion in the article,
not the LDL discussion.

Returning to LDL, the author's report of Rob Urgert statement regarding
French press brew is worth printing here:

"Of far greater concern, Urgert believes, were increases of between 9
and 14 percent in the concentrations of low-density-lipoprotein (LDL)
cholesterol -- the so-called bad cholesterol -- in volunteers drinking
the pressed brew. An increase this large in LDLs, a risk factor for
heart disease, might over a lifetime elevate an individual's chance
of developing coronary disease by up to 20 percent, he notes. Also
observed in several shorter studies by this group, this potent
elevation in LDL concentrations shows no sign of attenuating with
time."

--------------------------------

Regarding the second link, I copy the abstract here.

http://atvb.ahajournals.org/cgi/content/abstract/11/3/586

Cholesterol-raising factor from boiled coffee does not pass a paper
filter

M van Dusseldorp, MB Katan, T van Vliet, PN Demacker and AF Stalenhoef
Department of Medicine, University of Nijmegen, The Netherlands.

Previous studies have indicated that consumption of boiled coffee
raises total and low density lipoprotein (LDL) cholesterol, whereas
drip-filtered coffee does not. We have tested the effect on serum
lipids of consumed coffee that was first boiled and then filtered
through commercial paper coffee filters. Sixty-four healthy volunteers
consumed six cups per day of this boiled and filtered coffee for 17
days. Then, they were randomly divided into three groups, which, for
the next 79 days, received either unfiltered boiled coffee (lipid
content, 1.0 g/l), boiled and filtered coffee (0.02 g lipid/l), or no
coffee. Serum total cholesterol levels rose by 0.42 mmol/l (16 mg/dl;
95% confidence interval [CI], 0.14-0.71), LDL cholesterol levels by
0.41 mmol/l (16 mg/dl; 95% CI, 0.16-0.66), and apolipoprotein B levels
by 8.6 mg/dl (95% CI, 3.8-13.4) in those who consumed boiled coffee
relative to those who consumed boiled and filtered coffee. Responses of
triglycerides, high density lipoprotein cholesterol, and apolipoprotein
A-I did not differ significantly among these groups. No significant
effects on serum lipid levels were found in the boiled and filtered
coffee-consuming group compared with those who drank no coffee. In
subjects who drank boiled coffee, serum campesterol level, an indicator
of cholesterol absorption, remained constant. The serum lathosterol
level, an indicator of cholesterol synthesis, increased by 11% (p less
than 0.05), but the lathosterol to cholesterol ratio did not change. We
propose that paper filters of the type used for drip-filtered coffee
retain the lipid present in boiled coffee and in that way remove the
hypercholesterolemic factor.

----------------------------

The third link:

http://aje.oxfordjournals.org/cgi/content/abstract/153/4/353?maxtoshow=&HITS=&hits=&RESULTFORMAT=1&andorexacttitle=and&fulltext=cafestol+LDL&andorexactfulltext=and&searchid=1133756574525_23376&stored_search=&FIRSTINDEX=10&sortspec=relevance&fdate=1/1/1990&resourcetype=1

Coffee Consumption and Serum Lipids: A Meta-Analysis of Randomized
Controlled Clinical Trials
Sun Ha Jee1,,3, Jiang He4, Lawrence J. Appel2,3,5, Paul K. Whelton4, II
Suh6 and Michael J. Klag2,3,5,7

1 Department of Epidemiology and Disease Control, Yonsei University
Graduate School of Health Science and Management, Seoul, Republic of
Korea.
2 Welch Center for Prevention, Epidemiology, and Clinical Research, The
Johns Hopkins University School of Medicine, Baltimore, MD.
3 Department of Epidemiology, The Johns Hopkins University School of
Hygiene and Public Health, Baltimore, MD.
4 Tulane University School of Public Health and Tropical Medicine, New
Orleans, LA.
5 Department of Medicine, The Johns Hopkins University School of
Medicine, Baltimore, MD.
6 Department of Preventive Medicine and Public Health, Yonsei
University College of Medicine, Seoul, Republic of Korea.
7 Department of Health Policy and Management, The Johns Hopkins
University School of Hygiene and Public Health, Baltimore, MD.

Coffee drinking has been associated with increased serum cholesterol
levels in some, but not all, studies. A Medline search of the
English-language literature published prior to December 1998, a
bibliography review, and consultations with experts were performed to
identify 14 published trials of coffee consumption. Information was
abstracted independently by two reviewers using a standardized
protocol. With a random-effects model, treatment effects were estimated
by pooling results from individual trials after weighting the results
by the inverse of total variance. A dose-response relation between
coffee consumption and both total cholesterol and LDL cholesterol was
identified (p < 0.01). Increases in serum lipids were greater in
studies of patients with hyperlipidemia and in trials of caffeinated or
boiled coffee. Trials using filtered coffee demonstrated very little
increase in serum cholesterol. Consumption of unfiltered, but not
filtered, coffee increases serum levels of total and LDL cholesterol.

-------------

Note that they said, "Coffee drinking has been associated with
increased serum cholesterol levels in some, but not all, studies." I
have ceded that point to you in an earlier post. But despite the
"some, but not all" statement, note the study's conclusion in the final
sentence above, "Consumption of unfiltered, but not filtered, coffee
increases serum levels of total and LDL cholesterol."

-----------------------------------

I won't be surprised if yet another attack on me will result from this
post. I will not respond to it. I didn't perform the studies. Yet
you castigate me for informing you about them. You suggest that they
are not peer reviewed but as you can see they are. And you accuse me
of not reading them, but I assure you I have.

Neal accuses me of mining "utter trash" from the internet. I'll let
each of you readers decide if that is so.

So, we are left with the questions:

Does drinking unfiltered coffee increase LDL?
Does paper filtration prevent that increase?

Each of you is free to answer these questions as you see fit.

As I've said before, I am just the messenger.

I hereby retire from this argument and return focussing to coffee
brewing.

Sincerely yours,

Alan

.

Relevant Pages

  • Re: Coffee and cholestrol
    ... >lipoprotein cholesterol levels. ... >rise in homocysteine levels coffee. ... PMID: 1919421 [PubMed - indexed for MEDLINE] ...
    (sci.med.cardiology)
  • Re: Coffe oils bad for health? (French Press)
    ... Yes there are oils in coffee. ... at there being differences in cholesterol levels. ...
    (alt.coffee)
  • Re: Coffe oils bad for health? (French Press)
    ... Yes there are oils in coffee. ... at there being differences in cholesterol levels. ...
    (alt.coffee)
  • Re: Aeropress reviewed...
    ... This has absolutely positively nothing nada to do with cholesterol (and ... coffee or instant, ... This is a study on the effects of Arabica oil and ... papers by other professionals (usually in the same journals), ...
    (alt.coffee)
  • Re: Does instant coffee have cholestrol?
    ... instantcoffeehas. ... shows what its affect is on cholesterol. ... CoffeeConsumption and Serum Lipids: A Meta-Analysis of Randomized ... is instant coffee 'filtered'? ...
    (sci.med.cardiology)
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