Toss out your calorie counter. Pay no attention to the calorie count on food labels. Counting calories is a useless and simple-minded way to decide what you eat. How come? Firstly, a calorie is a unit of heat. Heat does not directly guide metabolism. When caloric heat is released, nothing will put it back.
Scientists have a very specific definition of a calorie. The simplest one is that a calorie is the amount of heat that is required to raise a cubic centimeter (milliliter) of water one degree Celsius, at room temperature and at sea level. Saying that you can consume calories is like saying that you can eat heat.
Many experts who should know better wrongly equate food calories to metabolism. This overly simplified claim is the basis for saying that food provides metabolic energy in the form of heat. Wrong!
Since calories are simply a measure of heat, you can see why they have nothing directly to do with metabolism. Calories effect temperature, so they really only help keep your body temperature where it should be.
Do you realize how food calories are measured? We completely incinerate the food in a lab instrument called a bomb calorimeter. When a substance is completely burned up, until nothing except its charred remains are left, it has lost all the calories that it contained. When this is done in a bomb calorimeter, the amount of heat that is released is expressed as calories.
In a bomb calorimeter, carbohydrates yield 4 calories per gram, proteins yield 4 calories per gram, and fats yield 9 calories per gram. However, it is nonsense to suggest that these food groups provide you with anywhere near the amount of heat that they yield in a bomb calorimeter. You can see why the whole business of keeping track of food calories, as measured in a bomb calorimeter, for weight loss is so misleading as to be ridiculous.
If your body behaved like a bomb calorimeter, then the calorie count of foods, such as those on food nutrition labels, would have more meaning. Your metabolism, however, has nothing to do with what happens in a bomb calorimeter.
You can never, ever get all the energy out of food. At the most you might get 10 to 20 percent of the potential energy through your fuel-harvesting metabolism. You will certainly never get more than 30 percent. Sometimes you won't get any calories at all. Using a calorie counter tells you nothing about how your body will metabolize different types of food.
Think about it. In a calorimeter starch yields the same number of calories as cellulose, gram for gram. However, cellulose is indigestible fiber and starch is a source of food energy for people.
Similarly, your body gets plenty of caloric value from potatoes and almost nothing from celery. However, in a bomb calorimeter, they would yield comparable calories per gram.
Instead of comparing food metabolism to a furnace (calorimeter), it is vastly more meaningful to understand the fate of different foods upon digestion. This entails how they impact different kinds of cells and tissues, such as fat vs. muscle, and what happens to these tissues because of different foods.
For a surprising example of what this means, compare the two nearly identical sugars, glucose and fructose. Following their metabolic fate is much more meaningful regarding their roles in diet and health than just keeping track of counting calories that they yield in a bomb calorimeter. In fact, these two sugars have identical caloric potential, 4 calories per gram. However, glucose goes into many different tissues, most notably muscle and brain, and intact fructose never escapes your liver.
The consequences of the different metabolic fates of glucose vs. fructose are tremendous. Glucose serves your entire body, whereas fructose has to be converted to something else before it can move through your liver. That something else is largely fat. A simple way to look at it is that fructose will make you fat much faster than glucose will. The caloric potential of these two sugars is irrelevant.
By the way, once you understand what is truly important about foods of all kinds, which is clearly not their calorie content, you will be very clear on why calories have nothing to do with being overweight. Chew on that comment for a while (pardon the pun), because this is the kind of clear thinking that will guide you to success in any weight loss or fitness program that works for a lifetime.
Scientists have a very specific definition of a calorie. The simplest one is that a calorie is the amount of heat that is required to raise a cubic centimeter (milliliter) of water one degree Celsius, at room temperature and at sea level. Saying that you can consume calories is like saying that you can eat heat.
Many experts who should know better wrongly equate food calories to metabolism. This overly simplified claim is the basis for saying that food provides metabolic energy in the form of heat. Wrong!
Since calories are simply a measure of heat, you can see why they have nothing directly to do with metabolism. Calories effect temperature, so they really only help keep your body temperature where it should be.
Do you realize how food calories are measured? We completely incinerate the food in a lab instrument called a bomb calorimeter. When a substance is completely burned up, until nothing except its charred remains are left, it has lost all the calories that it contained. When this is done in a bomb calorimeter, the amount of heat that is released is expressed as calories.
In a bomb calorimeter, carbohydrates yield 4 calories per gram, proteins yield 4 calories per gram, and fats yield 9 calories per gram. However, it is nonsense to suggest that these food groups provide you with anywhere near the amount of heat that they yield in a bomb calorimeter. You can see why the whole business of keeping track of food calories, as measured in a bomb calorimeter, for weight loss is so misleading as to be ridiculous.
If your body behaved like a bomb calorimeter, then the calorie count of foods, such as those on food nutrition labels, would have more meaning. Your metabolism, however, has nothing to do with what happens in a bomb calorimeter.
You can never, ever get all the energy out of food. At the most you might get 10 to 20 percent of the potential energy through your fuel-harvesting metabolism. You will certainly never get more than 30 percent. Sometimes you won't get any calories at all. Using a calorie counter tells you nothing about how your body will metabolize different types of food.
Think about it. In a calorimeter starch yields the same number of calories as cellulose, gram for gram. However, cellulose is indigestible fiber and starch is a source of food energy for people.
Similarly, your body gets plenty of caloric value from potatoes and almost nothing from celery. However, in a bomb calorimeter, they would yield comparable calories per gram.
Instead of comparing food metabolism to a furnace (calorimeter), it is vastly more meaningful to understand the fate of different foods upon digestion. This entails how they impact different kinds of cells and tissues, such as fat vs. muscle, and what happens to these tissues because of different foods.
For a surprising example of what this means, compare the two nearly identical sugars, glucose and fructose. Following their metabolic fate is much more meaningful regarding their roles in diet and health than just keeping track of counting calories that they yield in a bomb calorimeter. In fact, these two sugars have identical caloric potential, 4 calories per gram. However, glucose goes into many different tissues, most notably muscle and brain, and intact fructose never escapes your liver.
The consequences of the different metabolic fates of glucose vs. fructose are tremendous. Glucose serves your entire body, whereas fructose has to be converted to something else before it can move through your liver. That something else is largely fat. A simple way to look at it is that fructose will make you fat much faster than glucose will. The caloric potential of these two sugars is irrelevant.
By the way, once you understand what is truly important about foods of all kinds, which is clearly not their calorie content, you will be very clear on why calories have nothing to do with being overweight. Chew on that comment for a while (pardon the pun), because this is the kind of clear thinking that will guide you to success in any weight loss or fitness program that works for a lifetime.
About the Author:
Dieters who want to know how to lose belly fat can find excellent solutions online. The best overviews is Dr. Dennis Clark's free belly fat book.
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