I did say "in theory".
I have not read my BioChem for 20+ years. So my memory is kind of vague.
Anyway, if my memory serves me right.

It requires energy to break down intake fat and build body fat.
It requires energy to break down body fat and make it as energy.
No one can eat too much fat without Carb.

=>Moon Shooter <ROOT@Hotmail.com> wrote:
=>> In theory, the core idea of Atkins is;
=>> Without Carb intake, one's body has to burn protein and fat to build fat.
=>> This is why they ask you to eat enough fat(continueously) to ignite Fat
=>> burning to build Fat process.
=>>
=>> Since burning fat to build fat is a fat minus process, you loose fat(weight).
=>
=>The word is "lose", dear.  Loose is what you want your jeans to be.
=>
=>It's a darn shame you haven't the foggiest idea what you're talking
=>about.  Perhaps you've been listening to Kevin "quackmaster" Trudeau's
=>commercials about the Atkins package he sells, where he lies like a
=>rug about how Atkins works, just like he lies about every other product
=>he sells (and for many of which he's been prosecuted for fraud).
=>
=>Eating fat doesn't "ignite fat-burning", but it's easier to get
=>your body adjusted to running on fats for fuel instead of running
=>on carbs by eating plenty of fat (Induction).

You forget "Without Carb intake". Try to read my lines more carefully.
Since I said "Without Carb intake", "instead of running on carbs" is putting
your words on my mouth.

Now, without Carb intake, the body has two choices to make energy, either by
burning fat or by burning protein. If you are in no carb, low fat, high
protein diet, the body will burn protein and put lots of stress to your kidney
and liver. This is why fasting always lead to body mass(protein) loss first
instead of fat loss.

=>
=>However, eat too much dietary fat for your activity level, and your
=>body has no need to burn any bodyfat -- no weight loss.  Eat even
=>more fat, and you can store it and gain weight despite eating almost
=>no carbs.  People often find somewhat more leeway in the amount of
=>overage before gaining on LC, but it doesn't miraculously defy
=>known principles of physics.

For argument sake;
Let's say you weight 200lb(90kg). roughly you will need 0.198lb(90g) protein
intake to sustain your body.
Let's say you eat 1lb of fat and 0.198lb protein only today which is about
450g (450*9=4050Kcal) from fat. Presume protein is for body block(not for
energy).
First the body needs energy#1 to intake, digest and break down 1lb fat and
protein.(minus all other detail)
Let's say the energy#1 is coming from body fat.
Then the body also need energy#2 to breakdown body fat to create energy#1.
(let's ignore the source of energy#2 and all other detail here.)
Then the intake fat is breakdown and go into your blood and through your liver
and body.
Let's say you need 3000kcal for this special day(1lb fat eating day).
Now you have 1050kcal left.
So your body decide to store it as fat.
Then you need energy#3 to burn more body fat to create energy#4 to store this
1050kcal fat.
Let's say it is a perfect world, so you get to store 116g fat(about 0.25lb)
into your body.
Last you also need energy#5 to convert body fat to energy#6 for protein(body
rebuilding)

Since I throw my biochem books long ago, so I can not tell you how much energy
is energy#1+energy#2+energy#3+energy#4+energy#5+energy#6

If I remember it correctly, without carb, the whole process is a net loss.

=>
=>
=>168/125/125  coming up on 8 years
=>LC since 2/18/97 maintaining since 3/17/99

Show me someone that eats too much fat without carb and gain weight.

Very last, I might be wrong about this, because there might be some new
discovery in biochem. My opinion is solely based on 20+ years old knowledge.