Chronic coffee consumption has a detrimental effect on
aortic stiffness and wave reflections by Charalambos Vlachopoulos in the June 2005 issue of the American Journal of Clinical Nutrition found, “Chronic coffee
consumption exerts a detrimental effect on aortic stiffness
and wave reflections, which may increase the risk of
cardiovascular disease.”1 This study shows that
coffee causes its ill effects by impairing the function of
the arteries, which increases the risk that these blood
channels supplying the heart muscle will be compromised,
leading to a heart attack.
Comments:
The
results of studies on the effects of coffee drinking on the
risk of death from heart disease are conflicting; however,
the evidence seems to indicate that at high levels of
consumption this popular drug is detrimental. Besides
the manner of harm found in this study, other mechanisms may
account for more heart disease in coffee drinkers. There
are two substances found in coffee beans, cafestol and
kahweol, which raise total cholesterol, “bad” LDL-cholesterol
and triglycerides.2 On average, cholesterol is
increased by 10%; but very potent boiled coffee can raise
total cholesterol by as much as 23% (that could mean a 50
mg/dl increase for someone starting with an average
cholesterol of 210 mg/dl). Triglycerides may be increased
by a similar amount. Coffee will raise the systolic blood
pressure (top number) by 5 to 15 mmHg and the diastolic
(bottom number) by 5 to 10 mmHg.3 People who are
heavy coffee drinkers may also have a tendency to abuse
themselves in other ways, such as consuming more heart
damaging, high-fat, high-cholesterol foods.
Coffee
drinking rightly deserves its reputation as “a bad habit.”
For more help with this addiction please refer to two
previous newsletters found in my archives: July 2004: Coffee - Pleasure or Pain, and October 2004: Tea Time Increases Life Time.
1) Vlachopoulos
C,
Panagiotakos D,
Ioakeimidis N,
Dima
I,
Stefanadis C. Chronic coffee consumption has a detrimental effect on aortic stiffness and wave reflections. Am J Clin Nutr. 2005 Jun;81(6):1307-12.
2)
Urgert R, Katan MB. The cholesterol-raising factor from
coffee beans. Annu Rev Nutr. 1997;17:305-24.
3)
James JE. . Critical review of dietary caffeine and blood
pressure: a relationship that should be taken more
seriously. Psychosom Med. 2004 Jan-Feb;66(1):63-71.
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