Originally Posted by MarneeDear
It is really quite simple. The problem is that you cannot look at this from a calories point of view. Here is why:
The body does not convert calories, which are units of heat used to model the energy output of food, into body fat. The body stores fat and amino acids/protein only. The amino acid contribution to the energy equation is negligible compared to fat, and usually desirable, so we can ignore that. So, the amount of fat you would store on your body during any given period would have an upper limit of the amount of fat you ate during the same period, irrespective of calories. In other words, if you ate eleventy million calories in only sugar, you, amazingly, would not get fatter.
The actual amount of fat stored would then be the difference between how much fat you burned during the day and the amount of fat you ate. The amount of fat one burns depends on a number of factors, but the deciding factors are:
- Degree of ketoadaption: This refers the fat burning pathways which are usually stunted in those on higher carb diets.
- Activity level, especially time not spent anaerobically.
That is amazing, mainly amazingly untrue
. Carbs are stored as glycogen, in your liver and muscles. If they are not used immediately for energy they go there next - if there is storage capacity - and usually there is in the liver.The liver preferentially stores glycogen derived from fructose - which is half of whatever sugar you injest. These stored carbs turn out to add quite a bit of weight - non-fat body weight - because carbo-HYDRATES hold a lot of water as well.
Not all the carbs that aren't stored this way will be turned into body fat though, but some will be. Obviously fiber will not be turned into visceral fat - soluble fiber is digested through fermentation into short-chain fatty acids that are used throughout the body. They do not enter the lymph for delivery to the lypocytes. The generally accepted caloric value of soluble fiber is around that of most sugar alcohols - 2ish cals per gram. But some of the carbs you eat, especially if your glycogen stores are full, will be turned into fat. No doubt.
It's hard to predict how much, because of all the reasons mentioned above. But nothing prevents this - unfortunately!
It's an interesting subject, and I don't know everything about it or what goes on, but I do know this much.
The other side of the coin is that if you're eating at a deficit, even eating lard probably won't increase your fat stores.
So in some ways, you can enjoy yourself while dieting even more (depending on your plan) and not worry as much about fat intake per se.