You also once asked on some nutrition forum (this one) and got the answer (from me): no, you won’t turn most of the calories back to fat.
There are a variety of reasons why, but there are limits to how quickly your body can take up and store fats. To test this for yourself, drink a coup or two of olive oil. You’ll find that a lot of it literally goes right through you. And of the fat that gets into your blood, not all can be stored in fat cells; there are limits to how much they can take in or put out in a given day. for an obese individual with more fat cells, this number may be higher, but there are still limits.
Another reason is that when you’re dieting, you reduce your stores of glycogen (stored carbs) and your body reduces its rate of carbohydrate oxidation. Then, when you do you binge, the intake of carbs causes a rapid ramp up carbohydrate oxidation - that is, burning carbs - as your body uses the carbs for useful work (like rebuilding and repairing lean tissue) and in useless work (like generating lots of body heat.) Your body also takes a lot of the incoming carbs to replenish glycogen supplies. Between the storage and the burning, no carbs may be left to be stored as fat… so 1,000 kcal of carbs can be diverted to completely non-fat purposes.
You can see some excellent analysis in the paper Glycogen storage capacity and de novo lipogensis during massive carbohydrate overfeeding in man. Here’s an image from the paper:
On this chart, on days 1 and 2, the subjects had zero grams of carbs, and a couple of carbs on day three. On day 4, they had 750 grams of carb (about 3,000 calories); more than half was burned (the gray area of carbohydrate oxidation) and a little under half was stored as glycogen (the white area). None was stored as fat.
On day 5, they took in 800 grams of carb (3,200 calories); even more was burned off - 500 gram’s worth (2,000 calories), some was stored as fat (de novo lipogensis), and some was stored as glcogen. By day 8, when the glycogen stores were full, they were creating a lot of stored fat from the incoming carbs - but more than half of the incoming calories were still being burned off rather than turned into fat - that’s 2,000 calories of carbs being burned off. On day 11, they abruptly cut the carbs back to zero; fat creation continues a little bit. On day twelve, there’s still some carbohydrate burning going on (coming out of the glycgoen stores.)
Overall, it’s remarkable how quickly the body ramps up the carb burning when you take a lot in after having too litte… and remarkable how quickly your body shuts it down when you stop eating it. But this is a big part of the explanation to why a binge doesn’t lead 100% to fat gain.
You are wrong. I’ve done it several times. I’ve been on 2000+ calorie deficits for weeks, and so have many others. And I’m fine and typing away.
I did not come into this thread with a statement that MY personal method was the best. I didn’t even say what my personal method was. You really need to start paying closer attention if you’re going to be throwing statements around like that. The statement I made to which you replied, starting all of this, is:
You’re turning that into my “personal method?” Take a little care, @Telos. You can doubt my interpretation of the science, but please don’t accuse me of pushing personal beliefs onto others.
I cited them in response to your request for citations, despite having made no citations of your own. I can cite many more, if I have a reason to, but I’m really getting quite tired of repeating myself. Without any sighs, I’ll tell you I’ve had this general discussion more than once, myself, but I’m certainly tiring of it right now.
I don’t see why I should provide anything more given that you haven’t provided anything in the way of citation or research in our discussion beyond “I actually asked once on some nutrition forum and no one really seemed to be sure…”
I feel like I’m making a lot of effort here, but that it’s either not appreciated, or understood, or both… so I’m not inclined to keep at it.