None of this is true, it is completely ignorant of human metabolism and how we store body fat. There is only one way we store fat, through the hormone insulin, dietary fat doesn't stimulate insulin production. The average obese American eats a diet that is WAY too high in carbohydrates, specifically of the refined nature, that is the source of the problem, not dietary fat. Also, calories don't matter. Calories are a measure of thermal energy and your body isn't a steam engine.
I think you are right for the most part, but there is a clarification I'd consider. You are correct in the fat doesn't stimulate insulin, but if insulin is present when fats are in the gut, you can rest assured that the fatty acids and glycerol will be stored up into fat cells
before carbohydrates do.
This is natural because it costs the body far less energy to convert glycerol and fatty acids into fat droplets, which are then added to the fat cell.
"It is also possible for fat cells to take up glucose and amino acids, which have been absorbed into the bloodstream after a meal, and convert those into fat molecules. The conversion of carbohydrates or protein into fat is 10 times less efficient than simply storing fat in a fat cell, but the body can do it. If you have 100 extra calories in fat (about 11 grams) floating in your bloodstream, fat cells can store it using only 2.5 calories of energy. On the other hand, if you have 100 extra calories in glucose (about 25 grams) floating in your bloodstream, it takes 23 calories of energy to convert the glucose into fat and then store it. Given a choice, a fat cell will grab the fat and store it rather than the carbohydrates because fat is so much easier to store."
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So basically, you need to choose to either eat a high fat diet or a high carb diet, but certainly not both. If you choose the high carb diet, you must also choose a high protein and high fiber diet as well as avoiding simple sugars as much as possible. I have found this approach to be far superior to any other that I have tried, including high fat/low carb diets.
Fats will only be used as energy in the absence of glucose in the blood and glycogen in the muscle & liver. Otherwise, you'll use those first.
If fats are non-existent in the diet, you'll be readily using glucose and carbs for the main source of energy,
especially with intense exercise. Since carbs are far less efficient to convert to fatty acids, and they aren't as caloricly dense, it is much harder and less lilkely to store them as fat assuming that you are on a very low fat diet. Again, this is only true with carbs that are broken down very slowly. Sugars, refined carbs, and carbohydrate meals lacking protein and fiber will cause fat gain, too due to the surge of
unnecessary amounts of glucose in the blood stream. Your body will only use what it needs at that moment and
store the rest for later use.
just some food for thought.
Also, Point 1, 3 & 4 are very true statements. Fats have a terrible TEF value, using very little energy to being stored up into fat cells, they are very caloric dense - the most of all three macro nutrients by far, and they do make things taste better when they are present.
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As a side note, it seems that this board has not discovered the reality that every "new" diet or approach, including Keto, Atkins & Paleo diets are all ancient methods with a new spin on them. There is no doubt that they have
some benefit to the body but that all depends on the goal as well.
I would suggest for those who are anti-carb and pro-fat dieters to consider discovering what pro bodybuilders and trainers have been doing for a few decades now that has proven wild success. The diet I outlined above is a variation of such. It is counter-cultural, but the successful bodybuilders keep it to themselves.
I am in no way advocating to avoid fats altogether. You need them to remain healthy, especially Omega 3's and 6's. But you honestly don't need 20-30% like people try and tell you all the time.