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Low-carb / High-Protein
Diets
By: Eric Schmidt - [health]
Some
of the more popular diets out there today come in the form of low-carb. There
are multiple
approaches to why they say this works, from the idea that
it's easier to gain weight from carbohydrate
calories than from protein
and fat calories to the idea that eating fewer carbs will promote weight loss
due to the fact that unbalancing your diet will cause an increase in
your metabolism.
Your body doesn't need carbohydrates for fuel, it can
survive solely on protein and fat if necessary, but
your brain can't,
the brain requires carbohydrates, it has no way of using protein or fat energy,
which is
enough reason for many people to avoid low-carb
diets.
Low-carbohydrate diets also promote ketosis, when weight loss occurs,
fats and proteins are used by
your body to create energy, when the body
has a lack of carbohydrates it can't properly break down the
fats into
fatty acids for fuel which produces ketone bodies, causing ketosis. Ketosis
sounds bad but it
really isn't, however one of the side effects of
ketosis can be bad breath, caused by acetones (one of
the bodies from
ketosis) being expunged through your breath.
As I mentioned earlier one of
the benefits claimed by the promoters of low-carb diets is that
unbalancing your diet will increase your metabolism, this simply is not
true. Other than short term
bursts from drugs, the only way to raise
your metabolism is through exercise.
The American Heart Association has
plenty to say on low-carb diets, including the Atkins, the Zone,
Sugar
Buster, and the Stillman diet. Robert H. Eckel, M.D., chairman of the American
Heart
Association's Nutrition Committee had this to say, ''They put
people at risk for heart disease and we're
really concerned about
this''. ''These diets will raise the.. bad cholesterol and increase the risk for
cardiovascular disease, particularly heart attacks.''
Judith Stern,
professor of nutrition and internal medicine at the University of California,
Davis said this
on the subject, ''You want my response to Atkins saying
that his diet can lower your cholesterol and do
all sorts of good
things for your heart, you know what my response is? Bull!''
Yes, LDL
cholesterol (the bad kind) does usually drop as people lose weight from low-carb
diets,
however, that is due to the weight loss itself, NOT the manner
in which it was lost. Plus, it has been
shown that if people continue
on this diet as a weight sustainer after the weight is lost, ''Many people's
LDL goes up if they remain on the diet..'' said Eckel.
Plus, the
nutrition committee of the American Heart Association issued a science advisory
warning
about high-protein diets, they stated:
- Such diets may
produce short-term weight loss due to dehydration.
- Weight loss may also
occur through caloric restriction resulting from the fact that the diets can be
relatively unpalatable.
- These diets often restrict healthful foods
that provide essential nutrients.
- Individuals who follow these diets are at
potential risk of cardiac, renal, bone and liver abnormalities
overall.
- Any improvement in blood cholesterol levels and insulin
management would be due to weight loss,
not the change in your
food.
- A very high protein diet is especially risky for patients with
diabetes because it can speed the
progression of diabetic kidney
disease.
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