Type of Fat to eat in Atkins ?

Question -

Have there been any studies showing that one type of fat is better
than the others in losing weight with respect to weight loss.. ( Don't
care here about which fat is healthier, just talking about weight loss
goal ).

Eg. Does the weighting of monunsaturated,polyunsaturated,saturated
affect the amount of weight lost ?

http://www.physorg.com/news126965682.html

Potential drug target identified for diabetes by studying novel
gut-brain-liver circuit

Scientists at the Toronto General Hospital Research Institute have
discovered a novel signaling pathway between three organs - the gut, the
brain, and the liver - which lowers blood sugar when activated.

A team led by Dr. Tony Lam used a rat model to discover that fats can
activate a subset of nerves in the intestine, which then send a signal to
the brain and subsequently to the liver to lower glucose or sugar
production. But eating a high-fat diet for just three days can interfere
with this signal, disabling it so that it does not signal the other organs
to lower blood glucose levels.

The research was published in a paper entitled, "Upper intestinal lipids
trigger a gut-brain-liver axis to regulate glucose production" as an advance
on-line publication of the international science journal Nature.

"This is a new approach in developing more effective methods to lower
glucose or blood sugar levels in those who are obese or have diabetes," said
Dr. Lam, who holds The John Kitson McIvor (1915 - 1942) Chair in Diabetes
Research at the University Health Network and University of Toronto.
Currently, those with diabetes lower their glucose through diet, exercise,
anti-diabetic tablets or insulin injections (usually several times a day)
and must regularly monitor blood glucose levels. High glucose levels can
result in damage to eyes, nerves and kidneys and increase the risk of heart
attack, stroke, blindness, erectile dysfunction, foot problems and
amputations. Many laboratories around the world are in a race to find
alternative and effective ways in which to lower glucose levels because of
the severe complications which can result from high sugar levels.

"We already knew that the brain and liver can regulate blood glucose levels,
but the question has been, how do you therapeutically target either of these
two organs without incurring side effects?" noted Dr. Lam, who is also an
Assistant Professor of Physiology and Medicine at the University of Toronto.
"We may have found a way around this problem by suggesting that the gut can
be the initial target instead. Much like a remote control device, the gut is
able to relay a signal to the brain which in turn signals the liver to lower
glucose production. If new medicines can be developed that stimulate this
sensing mechanism in the gut, we may have an effective way of slowing down
the body's production of sugar, thereby lowering blood sugar levels in
diabetes."

Dr. Lam emphasized that it will take a number of years of experimental work
to determine whether this approach is effective and safe in humans who have
diabetes.

More than two million Canadians have diabetes. "Diabetes is an epidemic in
Canada and around the world and its numbers are continuing to increase at an
alarming rate, consuming our precious health care resources," says Dr. Gary
Lewis, Head of the Division of Endocrinology and Metabolism at the
University Health Network and Mount Sinai Hospitals in Toronto and Professor
of Medicine and Physiology at the University of Toronto. "We have good
evidence from clinical trials which shows that lowering blood glucose levels
towards normal in those who develop diabetes has a major impact in
preventing its devastating complications, so it is critical that we learn
how to control these levels in the most effective and least invasive ways
possible. Dr. Lam's work reveals a new regulatory circuit which provides
novel sites and targets to lower these levels in diabetes and obesity."

Dr. Richard Weisel, Director of the Toronto General Research Institute
(TGRI), Professor and Chairman of Cardiac Surgery at the University of
Toronto, welcomes any potential interventions which can help lower blood
sugar levels. "Studies have shown that people with very high blood glucose
levels are more likely to die from heart disease, so anything that we can
discover to help lower these levels would help in decreasing the progression
of and mortality from cardiovascular disease."

"Tony's discovery represents an exciting breakthrough that could eventually
lead to new ways to treat diabetes," observed Dr. Diane Finegood, Scientific
Director of the Institute of Nutrition, Metabolism and Diabetes, part of the
Canadian Institutes of Health Research (CIHR). "I am pleased that CIHR
played a major role in funding this research".

Working with rats, Dr. Lam and colleagues designed and performed a series of
elegant experiments which showed for the first time that the lipids or fats
which enter the small intestine trigger the afferent neuronal signal to the
brain which then sends signals to the liver to lower glucose production and
blood glucose levels in as little as fifteen minutes. No drop in levels
occurred when nerves were cut or blocked between the gut and the brain or
between the brain and the liver. The trigger to lower glucose was also
disabled when rats were fed a high-fat diet for three days prior to the
experiment, a finding which may suggest that those who eat a high fat diet
lose this beneficial signaling pathway.

Source: Canadian Institutes of Health Research

--

Ken

"Buddhism elucidates why we are sentient."
"Buddhism follows thought throughout the Universe."
"Karma means that you don't get away with anything."

"John" wrote in message
...
| Question -
|
| Have there been any studies showing that one type of fat is better
| than the others in losing weight with respect to weight loss.. ( Don't
| care here about which fat is healthier, just talking about weight loss
| goal ).
|
| Eg. Does the weighting of monunsaturated,polyunsaturated,saturated
| affect the amount of weight lost ?
|

On Apr 17, 5:40*am, John wrote:
Question -

Have there been any studies showing that one type of fat is better
than the others in losing weight with respect to weight loss.. ( Don't
care here about which fat is healthier, just talking about weight loss
goal ).

Eg. *Does the weighting of monunsaturated,polyunsaturated,saturated
affect the amount of weight lost ?

The healthiest fats are those we evolved eating which contain the
types of fat molecules our bodies can use and also bring with it
important fat soluble vitamins. Therefore animal sourced fats are
best. Fish oils, tallow, lard, chicken fat, etc.

On Apr 17, 11:00*am, Tunderbar wrote:
On Apr 17, 5:40*am, John wrote:

Question -

Have there been any studies showing that one type of fat is better
than the others in losing weight with respect to weight loss.. ( Don't
care here about which fat is healthier, just talking about weight loss
goal ).

Eg. *Does the weighting of monunsaturated,polyunsaturated,saturated
affect the amount of weight lost ?

The healthiest fats are those we evolved eating which contain the
types of fat molecules our bodies can use and also bring with it
important fat soluble vitamins. Therefore animal sourced fats are
best. Fish oils, tallow, lard, chicken fat, etc.

If you read the post, he said he didn't care about what was
healthiest, only what results in the fastest weight loss, presumably
on LC. I've never seen any such studies.

" wrote:

If you read the post, he said he didn't care about what was
healthiest, only what results in the fastest weight loss, presumably
on LC. * I've never seen any such studies.

Types of fats is a part of Atkins that does get mentioned
in various editions of the book, but it doesn't get much
stress. I've never figured out if he mentioned the topic for
general health reasons, because he suspected loss
might be better by type, or if he was concerned about
handling undetected deficiencies.

Once years ago I read a single study that compared
high percentage polyunsaturated fats compared to
high percentage saturated fats for the same total
calories and claimed the polyunsaturates beat the
saturates for loss. Being a single study never repeated,
color me skeptical on using it for a conclusion. I want
follow-ups that confirm the conclusion and I looked for a
couple of years without success. Lack of studies
duplicating the result is not a good sign. I think it ended
up being a "seek and ye shall find" situation where I
dug around until I located a study that said what I was
looking for. There are all sorts of individual studies to be
found to support almost any claim you care to dream up,
so follow-up studies confirming their conclusions matter.

There doesn't seem to be much down side to draining
off fat that's high in saturates and replacing it with fat
that's high in polyunsaturates (say a mixture of nut oils
maybe walnut and canola), but thinking that it might
trigger better loss is probably wishful thinking.

There is a specific case when type of fat will matter for
loss - If you are deficient in a specific type of polyunsaturate
without knowing it then your body will trigger a starvation
mode defense to retain that specific type. It would skew
fat metabolism making it appear like slower loss.

I've read that specific genetic populations (Amerinds from
the Pacific NW, Kelts from NW Europe) need a specific
fatty acid from fish oil while other populations can convert
plant based versions to it. If someone is in such a
population avoids fish their whole life they would end up
deficient.

If a person is deficient without knowing it, a strategy of
persuing healthy fats should handle it and loss rate
should increase. Tunderbar's suggestion might help
someone who's already having loss rate problems. Not
likely to have any effect on someone with 100+ to lose
currently losing 6+ pounds per month, someone with 50
pounds to lose currently losing 3+ pounds per month,
someone with 10- pounds to lose currently losing 1+
pounds per month. But someone under those ranges of
loss rates, may as well try various approaches.

wrote in message
...
On Apr 17, 11:00 am, Tunderbar wrote:
On Apr 17, 5:40 am, John wrote:


Question -

Have there been any studies showing that one type of fat is better
than the others in losing weight with respect to weight loss.. ( Don't
care here about which fat is healthier, just talking about weight loss
goal ).

Eg. Does the weighting of monunsaturated,polyunsaturated,saturated
affect the amount of weight lost ?


The healthiest fats are those we evolved eating which contain the
types of fat molecules our bodies can use and also bring with it
important fat soluble vitamins. Therefore animal sourced fats are
best. Fish oils, tallow, lard, chicken fat, etc.

If you read the post, he said he didn't care about what was
healthiest, only what results in the fastest weight loss, presumably
on LC. I've never seen any such studies.

Well, like Doug says, I have read claims that polyunsaturated fats are best
at weightloss. I have also read claims that polyunsaturated fats are
associated with higher cancer rates, except for CLA, which does the reverse,
supposedly.

In 1961 Dr. Herman Taller recommended the very new safflower oil (Omega 6)
based on his clinical experience. As I recall, in his book, Taller cited a
study of pigs. In the study they found that the fat tissue of pigs fed
polyunsaturated oil as their fat source developed (upon dissection) fatty
tissue that was very soft as compared to control group pigs' body fat.
Taller speculated that the softer body fat was easier to remove from the
body.

Another book I read (female author, I forget who) claimed that Omega 6
polyunsaturated oils caused the brown fatty tissue of the body to burn more
calories than they otherwise would.

In my personal experience, any fat* can be used for weightloss. The other
point about animal fats makes sense, and I also like the ideas of those who
advocate coconut as a source of fat based on healthy Islanders.

Cubit
320/156/160

*let's consider trans fats or oxidized oils to not be an option