MAR1984
New member
I simply mean if a fat calorie is the same or equal to a protein calorie then why do they have different energy outputs? Why doesn't carbs, fats, and proteins all have the same calories?
They do. 10 calories of fat provides the same amount of energy as 10 calories of carbs. 1 pound of steel weighs the same as 1 pound of feathers.
Now, 1 cubic foot of feathers weighs a ton less than 1 cubic foot of steel, but that is density, not weight. Just as 1g of fat having more calories than 1g of carbos is an energy density thing, not total energy. That means I can eat 2g of carbs roughly for the same energy as 1g of fat, and get the same energy. Thats all that has been mentioned - the same amount of calories, not the same amount in volume or weight.
Without getting extremely technical it is known science that during food absorption 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. So what happens when I sit down and absorb 300 calories of fat? Or for that matter what if I consume my entire days calories in nothing but fat? From the posts I have read I will be challenged I am sure to provide some study or medical report to this, however I don't have that much time on my hands so I will challenge those particular people to prove my statement incorrect rather.
Even if I accpet this entire paragraph as truth, I don't see anything that says anything to do with the topic - i.e. macros matter more than calories. First thing I guess we need to get straight is whether or not you believe in the concept of a BMR, or a set number of calories that the body burns in a day, regardless of what they are.
Then, assuming someone needs 2000 calories to maintain, and they ate 1500 calories, do you believe its possible to store fat? And similarly, if another person needs the same 2000 calories, would it be possible for that person to eat 2500 calories and NOT gain fat if they were eating some special combination of macros?
And the reality is, its an obvious exaggeration when it is said that you could eat candy bars and lose weight if you eat less calories than maintenance (even if its true), because its not healthy and no sane person would do it. The body needs fats, carbs, and proteins, and for anybody eating a balanced diet, it really is easy to simplify it to calories in < calories out. If its not working, then you've got one side of the equation wrong.
Besides who the heck wants to calorie count for the rest of their lives?
Nobody. Hopefully, I'll get to the point where I don't have to count anymore, that I'll have a good idea of what I'm taking in and what my body needs. Then it should be as easy as watching the scale and making small adjustments to food. And if I ever start gaining or losing more than what I want, back to counting again. When trying to lose (or gain muscle), thats when its important to really monitor your intake, if you want to make progress. Otherwise, you're not going to be making progress as efficiently as possible.

