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Burn The Fat, Feed The Muscle
Syndicated Q & A Column (Ask Tom / Ask The Fat Loss Guru)
Low Carb Diets For Weight Loss: Just a Myth
After All?
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Title: Low Carb Diets For Weight Loss: Just a Myth After
All?
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Low Carb Diets For Weight Loss:
Just a Myth After All?
By Tom Venuto
www.BurnTheFat.com
QUESTION:
Tom, I’ve been reading your stuff for years and I also read a
lot of other sites and message boards including some of the low
carb boards. I have finally come to the conclusion, both from
all my reading and my personal experience, that the idea that
one will lose weight just by cutting carbs is a myth.And I welcome anyone who thinks they can to go ahead and try to
prove me wrong. I’m not looking for a fight of course, just
looking for good information and discussion.
Consider the following two situations; each involves an
identical male who requires 3,000 calories/day to maintain his
current weight.
SITUATION #1: The individual reduces his calories to 2,500/day,
which theoretically will result in losing one pound/week. The
individual divides his calories so 60% (1500) come from Carbs
and the remainder come from Fat and Protein. Will he lose weight
even though he’s eating a lot of Carbs? I believe the answer is
YES because even though the carbs are high (60%), he is in a
calorie deficit.
SITUATION #2 The individual adopts a Low Carb Diet by eating
only 25 grams of Carbs daily (100 calories). He then eats an
additional 2900 calories of Fat and Protein. Will he lose
weight? I believe the answer is NO because even though the carbs
are low, he is eating at his maintenance level.
Now, I understand that there are advantages to controlling
insulin and reducing Carbs, including some health benefits for
some people, but what I often don’t see on the low carb benefit
list is the impact that fat has on controlling appetite. I
believe that Fat satiates even the largest appetite, causing you
to eat less.
Therefore, I believe that the reason a Low Carb Diet works is
because people who follow it eat fewer calories.
I would love to get your feedback on this Tom and if you or any
of your newsletter or blog readers have any studies or information
proving me wrong, please let me know.
- John in Texas
ANSWER:
Thanks for your well-thought out question John. Yes, we’ve
discussed this before, but it’s timely and worth discussing again,
especially with some of the long-term research that was just
published earlier this year.
You are preaching to the choir though, my friend. You are right, fat
loss hinges on calories in versus calories out. BUT — and there is a
big BUT — we really need to make some distinctions about low carb
and high protein so we don’t throw out the baby with the bathwater.
Low carb has some advantages. More imortantly, so does high protein.
Heres where most of the confusion comes from in this whole low carb
thing:
Are we talking about low carb in a free-living / ad-libitum (non
calorie counting) situation, or are we talking about a
laboratory-controlled study or a strict calorie-counting situation?
This makes all the difference because in a real world
(free-living) scenario, low carb almost always beats high carb for
weight loss, especially in the early weeks and months on the
program.
This can be partly explained by water weight and glycogen loss in
the intital weeks, but also by actual greater fat loss during the
early stages.
However, this is not because of “metabolic advantage” of low
carbs over high carbs, it is because subjects in these types of
studies ate less in the low carb group.
In other words, low carb diets usually control calorie intake
better, when you’re not counting calories (you get “automatic”
calorie control, provided you’re not a totally unrestrained eater,
of course).
So you are correct in your conclusion.
Furthermore, it’s difficult to eat too much when you remove an
entire group of calorie dense foods (sugars and starches) which are
a food group responsible for providing a huge portion of the
calories in most people’s diets. Sure, you can overeat on dietary
fat as well, at least in a mixed diet, but apparently not easily in
the absence of carbs. Now, heres the kicker… As soon as you start
controlling calories.. I mean hospital ward or research facility
controlled, where the subjects cannot pick and choose their own
food, and instead, the food is weighed and measured and almost
literally spoon fed to the subjects, the difference in weight loss
between low carb and high carb shrinks or even vanishes.
In other words, when calories are matched, there is little or no
difference in fat loss between a high carb and low carb diet, when
dietary fats and carbs are the variables manipulated.
In the long term studies, even more valuable data has emerged…
The big study by the New England Journal of Medicine that got all
that publicity earlier this year confirmed it once again… Even
though low carb diets work better in the short term for weight loss
in free living subjects, the advantage decreases by month six, and
disappears after a year or two. The moral of the story is (drumroll
please)… Most people don’t stick with ANY type of diet very well for
very long. And… the extreme low carb diets in particular have lower
long term adherence rates and poor long term maintenance rates. Now,
this does not mean that low carb diets do not have benefits. They
certainly do, and some of them are health related (which is beyond
the scope of this column). Other benefits are fat loss related… If
you automatically eat less due to appetite suppression and removal
of calorie dense foods, that is clearly an advantage, it’s just not
the advantage that most low carb advocates suggest. There is no
proof of metabolic advantage purely from restrction of carbs and
insulin does not lead to obesity in a cause and effect sense,
insulin merely plays a role in the process of partioning surplus
carbs into fat stores or in suppressing fat release. Insulin is
important to manage, but not the deciding factor in whether you lose
fat or not. One change in macronutrients that DOES help fat loss is
an increase in protein. Protein is highly thermogenic - about 30%.
So 30% of the energy in protein is not available for potential fat
storage, as it is metabolized just in the digestion process. So in
reality, you could say it’s the higher protein, NOT the reduced
carbs, that provides the real advantage!
Ironically, a low carb diet is NOT always high in protein!
Ketogenic low carb diets for example, are actually high in dietary
fat, not so much protein. most people don’t realize that. Too much
protein is somewhat gluconeogenic and kicks people out of ketosis.
Likewise, a high protein diet is not always low in carbs. Take
the 40-40-20 macro split from BFFM (or BFL) for example. 40% of
calories from protein is very high. And yet 40% carbs is not very
low!
The protein-induced thermodynamic advantage is somewhat small, but
it’s significant if a large shift in protein intake is made as is
the case with a 30-40% protein program. For example, the old food
pyramid/ traditional dietician-style diet is 15% protein. Research
from the University of Washington School of Medicine showed that
when protein is doubled to 30% (replacing carbs), there is a small
but measureable advantage even when matched calorie for calorie. In
free living studies, the advantage is even larger because protein is
a great appetite suppressant and is highly satiating. In fact,
protein NOT FAT, is the most satiating nutrient. It appears that fat
is psychologically satiating, but protein is the hands down winner
as the most satiating, appetite suppressing macronutrient,
physiologically speaking. Thus, a protein with every meal and a 30%
(or even higher) ratio of protein is conducive to better fat loss -
which incidentally is EXACTLY how the Burn The Fat, Feed The Muscle
program is set up. Theres much more to good nutrition and health
than just calories, but ultimately the most important factor is not
macro ratios or low carb vs high carb. When you sort it all out, fat
loss all comes down to a calorie deficit in the end. In my 26 years
of bodybuilding and 20 years as a fitness professional, I’ve tried
it ALL… I’ve gotten ripped on high carb and I’ve gotten ripped on
low carb; thousands of others can testify the same for either side.
What successful approaches have in common is a calorie deficit… AND
they are programs you can actually stick with. I simply believe that
if you can get even a slight advantage by bumping up the protein and
dropping the carbs, at least a little, why not take it? So that’s
why my bodybuilding-style pre-contest maximum fat loss program is
high in protein and low to medium in carbs.
learn more at ====>www.BurnTheFat.com
Train hard and expect success,
Tom Venuto, Fat loss coach
www.BurnTheFat.com
About
the Author:
Tom Venuto is a
natural bodybuilder, certified
strength and conditioning specialist (CSCS) and a certified personal
trainer (CPT). Tom is the author of "Burn the Fat, Feed The
Muscle,” which teaches you how to get lean without drugs or
supplements using methods of the world's best bodybuilders and fitness
models. Learn how to get rid of stubborn fat and increase your
metabolism by visiting: www.burnthefat.com
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