Artificial
Sweeteners and Overeating
by
Tanya Zilberter, PhD
It seems
that our body weight set points are not carved in stone. Clinical
studies revealed links between taste and the amount of food we eat.
What is overeating? It depends. For one person,
overeating means
that
she eats in excess of her energy expenditure, which may be due to the
sedentary needs. For another person, it's because of sluggish
metabolism. For yet
another, it can be a plain old cheating on his diet.
In this article, I'll talk about the weight-loss
plateau and one of
its aspects that is rarely discussed: taste and calories.
There are two issues in the weight-loss plateau
problem that
concerns low-carb dieters. First, what is this plateau ? is it anything
real or all in our
heads? Second, is low-carb stalled weight loss different from any other
diet stalling?
A Look at the General Problem of Plateaus
A weight-loss plateau is when you were losing
weight and then
stopped losing, without changing your diet, exercise or other lifestyle
factors. You eat
the same diet and exercise as much as before, but your bathroom scales
are
frozen at some mysterious point, sometimes referred to as the body
weight
set point (Just think of your refrigerator: it's the point you set to
maintain the temperature you want. Though different in details,
basically the same
parts make up the human body's "thermostat" or "fat-o-stat," for that
matter.)
Body weight set point is nature's idea of what
amount of fat you
need. If we deviate from nature's, it forces us to eat more ? even when
our Fat
stores are huge. Luckily, a low-carb diet allows your body to recognize
Your stored fat as legitimate fuel and uses it instead of storing it
(as it Does on any other diet.) However, there is another danger that
is often overlooked by low-carb dieters:
The Sweeter, the Heavier
It seems that our body weight set points are not
carved in stone.
Clinical studies revealed links between taste and the amount of food we
eat.
Tastier foods make the set point of body weight
shift up
proportionally, that is: the tastier the food, the greater the set
point. Researchers even showed that foods with negative taste
qualities, (in the study, researchers added quinine) do the opposite:
the more bitter the food, the lower the set point.
Artificial Sweeteners Are Not the Answer
Sweet taste -- even from artificial sweeteners --
causes an increase
in
calories coming from fat and protein. Why does this happening?
Sweet taste, even coming with artificial
sweetener, raises glucose
concentration in the blood before the food has a chance to be
digested. Your body knows that eventually, it will have all the carbs
you've swallowed and it doesn't wait until it that happens. Instead, it
releases some glucose from the carbohydrate depots and hopes to get it
all back. When the sweet food is real, the carbohydrates eventually get
into the blood. And if they're not? Well, nature never counted on us
inventing artificial sweeteners. Being fooled, your body reacts rather
vindictively: it forces you to want more sweet food plus eat
more next time, no matter what food you agree to have.
So, you'd be better off without artificial
sweeteners. There are
other tasty foods you can have on a low-carb diet.
Some Clinical Data on Fats:
- Preference for high fat foods appears to be a
universal human
trait.
- How much fat we eat appears to be determined
simply by the amount
of fat available.
- Fats are especially provocative in the obese,
who tend to overeat
fatty foods more than the lean.
Clinical Data on Other Tasty Foods:
- Good tasting foods increased so-called
diet-induced thermogenesis
(heat production after meals) and reduced food efficiency (how many
calories are used and how many pass through the intestines).
- Good tasting foods increase energy expenditure.
It seems like a
paradox, but when you eat what you really enjoy, you body gets less of
this particular food's calories.
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