Nutrition
Coffee:
Good or Bad?
Is Coffee Acidic?
Coffee
is an acidic beverage. Acidity is determined by the effect that the food
has on urine pH. As coffee increases the acidity of urine after it has been
drank, it is classified as an acidic food. The pH of coffee actually
hovers around 5.0 to 5.1 which is more neutral than beer and fruit juice, and
similar to carbonated water. It is interesting to note that darker
roasted coffees are less acidic both in their flavour profile and in their
actual acid content.
Coffee and Antioxidants
It is
interesting to note that coffee is actually a major source of antioxidants in
the diet. Antioxidants are substances that prevent or slow oxidative
damage to the body. Caffeinated and decaffeinated coffee appears to
provide similar amounts of antioxidants. Coffee contains chlorogenic
acids and melanoids, which trap free radicals and are powerful
antioxidants. It also contains phenols, volatile aroma compounds, and ox
azoles, which are efficiently absorbed by the body.
It is
not that coffee has a higher concentration of antioxidants; it’s that coffee
drinkers consume more coffee than any other source of antioxidants. In
fact, in the American diet, coffee is the number one source of
antioxidants. Coffee is actually more efficient than fruit and vegetables
in preventing the oxidation of DNA, the source of a number of serious
illnesses, including cancers.
Benefits of Coffee
Recent
research has shown that coffee can be a highly beneficial drink. As well
as its value for antioxidants, there is evidence that coffee can reduce the
risk of several serious ailments such as diabetes, heart disease, and cirrhosis
of the liver.
Coffee
& Diabetes
Recent
research has showed that habitual coffee consumption may lower the risk of Type
2 diabetes. A recent
Harvard University study, which monitored
100,000 people over 18 months, found that men who drink more than six cups of
coffee a day reduced their chances of developing Type 2 diabetes by more than
50%, compared to non-drinkers. The exact reason for this reduction is not known
but the antioxidants in coffee can help to control the cell damage that can
contribute to the development of type 2 diabetes. The chlorogenic acid in
coffee has also been shown to reduce glucose concentrations. The caffeine
appears to play no part as decaffeinated coffee also appears to do the same
thing.
Coffee
& Cardiovascular Disease
Some
studies have shown that drinking coffee also has a beneficial effect on
the cardiovascular system. In fact, one study by the Harvard School of Public Health found that drinking one to three cups of coffee per day can
reduce the risk of cardiovascular disease by 24 percent compared to those that
do not drink coffee at all. However, as the quantity of coffee consumed
increases, the benefit decreases.
A study by the American Heart Association found that regular coffee drinking among women reduces
their risk of stroke. Interestingly, there was a 20% reduced risk in women
drinking four or more cups of coffee a day. However, the study also found that
the regular coffee drinkers tended to smoke more than the women who drank less
coffee.
It is
suggested that people that have high blood pressure or other risk factors for
heart disease drink no more than three cups of coffee per day.
Coffee
& Parkinson's Disease
Coffee
can also protect you against liver and colon cancer and Parkinson’s disease,
according to some studies. Researchers
from the University of Porto in Portugal found that drinking two to three cups of coffee each day
can lessen the risk of developing Parkinson's Disease by around 25%.
Side Effects of Coffee
The
side effects of coffee are well known and include causing stomach pains, and
making you feel jittery. Some studies have also linked coffee with higher
blood pressure and heart rates. Coffee may also contain some potentially
carcinogenic substances.
As
with all foods, the key is to consume coffee in moderation.
Edited by Vaneshya Thanabalan