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Are you a doctor? I know that most doctors don't believe in each others. It happened that there are many doctors among my relatives and none of them believes in Atkins diet or can even see how any other doctor can? When I meet any of them, I talk about anything but my diet! Even my personal doctor, despite that my health is doing great, he always lectures me against Atkins diet.
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Medical doctor? No; and I think my lack of an alphabet-soup following my name is to my advantage - it's allowed me to approach the data from a perspective of curiosity and development of understanding rather than "think" I know what I was taught in med school. And, guess what, the entire biologicial reason why a low-carbohydrate diet works is right there in the anatomy & physiology textbooks medical doctors read in medical school. It's almost as if medical school later makes them disregard what they learned earlier!
When I've presented to physicians and other healthcare professionals (yes, I've been invited to present at various conferences and seminars over the years, despite my lack of formal medical training), the first thing I do is provide each attendee with a textbook, instruct them to open to the page I'd like them to, and take them through the basics once again. I make it a joke, a game, and it sets the stage for the next set of data I present.....the approach I use lays the groundwork to open up the possibility for "getting it" as I continue....
With the hard data from studies, masked to not identify which diet was which for the conclusions.....and I let them decide which one worked better for human metabolism, risk factor improvements and weight.....then I move to present side-by-side menus of each diet, and most agree that both look good, despite the fact one is absent grains. The clincher is the nutrient profile of each - when I show how miserable the low-fat diet is for essential nutrients, compared with the high nutrient density of the low-carb diet (they still don't see which is which explicitly, although they know what the topic is), it's the logical next step to want to know why it's better....which takes me back to the textbook to go step-by-step through substrate utilization in glucose and fat metabolism, and which essential nutrients are required along the way....and what a deficiency leads to in the metabolic works in the short term and long term.
I've used this approach with physicians, nurses, CDE's, school teachers, and others - and it always works....not because I'm an expert, not because I'm special - but because it makes them look at
what they already know!
Are there still naysayers? Of course, but each time I present and capture one or two or three in the audience, it builds understanding outside the paradigm dogma and makes them start to question what they think they "know" about diet and health; and even the naysayers are left with a more positive understanding of the biological basis of carbohydrate restriction.
That said, my question to you was "Your evidence to support this?" to the contention that somehow 1000-calories on a low-carb diet is physiologically different than 1000-calories on a low-fat diet.
While you want to use anecdotal experience/evidence as your basis, that's fine for an "n of 1" - but what about across a population? What exactly is one risking if they take your anecdotal experience and put it into action?
We have data that finds chronic nutrient deficiency leads to chaos in the endocrine system and central nervous system (the two are intimately dependent on each other); 1000-calories each day, for an average person, is simply not enough calories to provide enough food-based essential nutrients (vitamins, mineral, trace elements, fatty acids and amino acids).
We have good data the body will adapt and work with what it does for a short-period and a semi-extended period of time (months). We have good data that even over true extended periods, the body will adapt and work with what it has - but over longer and longer periods, begins to fail, first in small subtle ways and then in a cascade....such data isn't in weight loss trials, but in studies of eating disorders, malnutrition, stunting in children, starvation studies conducted by the military, etc.
Which is why I wish researchers would cross-talk more and open up access more to various journals - the data to really begin to connect the dots isn't accessible easily, and I think it should be! I've spent countless dollars having to pay for access to hundreds of journals to write my dissertation, and the data is there - it just needs to be connected to make sense on the whole.
So, then, you said
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Theoritically, when we eat less, we should expect our bodies to get all the missing calories from our energy stores and feel us normal. What do we get by storing energy, if we cannot use it back when we need it?
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Our stored energy is definitely there for use - and over short periods, a severe calorie restriction will not result in long-term damage to the system (metabolism); however, over a longer period of time, as the calorie restriction remains chronic and constant, the body begins to make compromises - compromises that can and will have a detrimental effect on long-term health if continued for a prolonged period of time; and more specifically when chronic essential nutrient deficiency is also present.
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The table showed that 10 net carbs have made me eat near 1000 calories while 40 carbs made me eat 2000. I have been eating untill I'm full and did not feel like not getting enough energy at any carb or calorie intake amount.
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Don't take this the wrong way, but an additional 20g of carbohydrate results in an additional absolute 80-calories more, not 1000 calories more.....your CHOICES increased your calorie load, not the carbohydrate per se.
If you're consuming just 1000-calories a day, I truly hope you're careful with your planning and are ensuring adequate intake of essential nutrients.....it's next to impossible at the level of calories, and I worry that at some point when you do increase your calories, you'll see what I'm talking about when your metabolism reacts to reverse the condition of famine you've created in an effort to maintain weight.