|
 |
| Drinks |
 |
| |
 |
| |
|
| Try
to include plenty of non-caffeinated
drinks |
Caffeine acts as a
stimulant to the heart
and central nervous
system, and is also
known to increase blood
pressure in the short
term, although there
is no conclusive evidence
of long-term effects
on blood pressure.
The effects on blood
pressure are most likely
when caffeine is taken
in excessive quantities
or by highly sensitive
people. In particular,
people who are hypertensive
(have habitual high
blood pressure), are
advised to avoid caffeinated
drinks, while pregnant
women are advised to
limit their intake of
caffeinated drinks to
less than 300mg per
day.
|
Coffee |
 |
Coffee
has been linked
with a number of
the risk factors
for coronary heart
disease, including
increased blood
pressure and high
blood cholesterol
levels. However,
no relationship
has been found between
coffee drinkers
and the likelihood
of developing coronary
heart disease.Coffee
may be beneficial
in some areas of
health. Research
has found that coffee
may reduce the risk
of developing gallstones,
kidney stones and
colorectal cancer.
|
It's difficult to
suggest a safe limit
for coffee intake
because of the huge
variation in caffeine
content of different
brands and an individual's
sensitivity to the
drug. People with
high blood pressure
and pregnant women
are advised to limit
their caffeine consumption.
For the rest of
the population,
there's no evidence
coffee does any
long-term harm.
Caffeine does have
a very mild diuretic
effect, however,
so try to include
plenty of non-caffeinated
drinks throughout
the day as well. |
Tea |
 |
Tea
does contribute
slightly to our
intakes of minerals,
and it certainly
helps to replace
lost fluids, but
the health interest
in tea at the moment
surrounds its potential
role in lowering
the risk of coronary
heart disease and
some cancers.
Tea contains antioxidant
substances called
flavonoids. These
have been shown
to help slow or
inhibit the chemical
reactions thought
to take place during
the development
of coronary heart
disease. So sup
up
|
|
| |
| Food |
Caffeine
content |
| Coffee
(mg/cup) |
| Instant |
61
to 70 |
| Percolated
ground |
97
to 125 |
| Tea
(mg/cup) |
15
to 75 |
| Cocoa
(mg/cup) |
10
to 17 |
| Chocolate
bar |
60
to 70 |
| Cola
drinks (mg/12oz
can) |
43
to 65 |
|
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