The following is a post from a low-carb community message board:

Hello all,

I have been eating the natural human dietary regime for over 47 years
now. I do not eat anything whatsoever from vegetable sources. The only
things veggie I use are spices. My diet is usually 60% fat and 40%
protein by calories. I used to eat 80/20 when younger and about twice
as much quantity of meat also, but that seems too much energy at my
age, which is 71- even though I am very active. I think the body
actually becomes more efficient with energy as you age, but I have no
way of proving it true. Otherwise, my body today is very like it was at
the age of 30. I figure most of what we call 'aging' is due to insulin
damage to the collagen and other body structures. No carbs = no
insulin. I don't heal quite as fast when injured as I did as a
youngster, however. But I have few wrinkles, and my skin is still
strong and elastic.

At this point I would like to point out that a zero carb diet does NOT
cause ketosis. The body rapidly adapts within a few weeks and begins
consuming the ketones from fat metabolism. A fully keto-adapted body
excretes no ketones in the urine. A metabolic by product, 'ketone
bodies' are actually a special kind of carb, and they substitute for
glucose at the structures which use it. They have the added advantage
of making you feel good- and well fed.

The body cannot store dietary fat, there is no mechanism for transport
across the adipose cell's wall, nor can it 'burn' carbs, which actually
are toxic in more than the tiny amount required by the brain and a few
other structures. The body converts dietary carbs (all convert to
glucose as they are absorbed) into body fat. The conversion mechanism
requires insulin which is very tissue-damaging. It is correct to say
that dietary carbs are the base cause of both heart blockage and
diabetes, (not a disease).

I must warn all of you that it is very unlikely that very many will be
able to eat as I do over the long term, or in fact, to follow any diet
for long which is much different from the one you were trained to as a
baby/child. This is because diet is learned much the same way language,
dress and behaviour is, and is buried deep and inaccessible, a part of
your acculturation/socialisation. The very thing which makes us human
is that deep and almost instinctive complex of behaviour.

It requires a powerful will and a determination to change, in order to
succeed in adopting the 'extreme' diet which this website is based on.
Even those who are morbidly obese, as powerful a motivation as any I
can imagine will have 'cravings' for what I call 'non-food' (all
vegetation and carbs) which will eventually prove irresistible. A few
may manage to stay on the diet for years, but unless you are prepared
to stick with it for maybe ten or more years, you will drift back into
eating what I consider poison. For some reason my mum was not
interested in forcing me to eat the veggies I hated so, and i was able
to eat only what I liked- mostly meat, especially hamburger and the fat
those at our table would cut from their steaks. Still I had massive
struggles abandoning the 'civilised diet'.

I suggest that no non-food be taken home, none allowed in your fridge
or pantry (out of sight is hopefully out of mind). Make a request when
seated in a restaurant that the bread bin be removed (but please leave
the butter), and when ordering, request that the vegetables be removed
from the plate in the kitchen (just say you don't like to see 'good
food go to waste').

Even during the years I was soundman for Grateful Dead, I stuck to my
guns and remained totally carnivorous. I am restricted by the forums
rules (as I read them) from telling about my essay on diet and exercise
which is posted on my website. Basically it states that humans were
totally hunting peoples until the end of the paleolithic age. No
paleolithic archeological dig has ever produced any food residues from
vegetables. Chemical analysis of bones from the digs indicates they are
the same composition as the African lion- thus, virtually no intake of
vegetation. There were no 'hunter-gatherer' societies until the
neolithic, even though some modern HG tribes still made and used
typical paleolithic napped-stone tools. The so called Nearthin and
Paleodiet thus are both nonsense, true paleolithic people were total
carnivores and ate no veggies whatsoever.
In the relatively short evolutionary period since the consumption of
vegetables as food there has not been any real adaptation to such low
grade low energy, difficult to digest foods. Because we have no
adaptation to digesting or processing vegetables as food, they are all
basically very bad for us.

We evolved as an active, group-hunting animal. We have a high natural
requirement for physical exercise and cannot live long or be healthy
without a lot of it.

I hope my post is of some help to others. Just persist. I show that it
IS possible to overcome your dietary socialisation.
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Check out the Zero Carb Path for more information
http://zerocarbpath.blogspot.com

As featured in Living La Vida Low Carb
http://livinlavidalocarb.blogspot.com/2006/05/how-about-zero-carb-carniverous-di
et.html