Eli5…. when do we put on the fat? Is it immediately after eating those extra calories? Once a week? When?
When do you lose the fat? Right when you start eating less calories? Sorry… just confused and wondering
Thanks for your responses
In: 116
There are two sources of body fat.
The first is dietary fat. You eat fat, it goes into the bloodstream and the excess goes into fat cells. When the body needs fat, it pulls it out of fat cells. That part is simple.
The second is excess carbs.
If you eat a chunk of glucose, it will raise blood glucose. The body can deal with that in three ways:
1. It can burn more glucose and less fat.
2. It can convert glucose to glycogen and store it in the liver or muscles.
3. It can convert glucose to fat – either in the liver or fat cells – and store it in the fat cells.
The first two are preferred by the body but can’t deal with very much glucose, so if there’s a big chunk it ends up as fat.
If there is fructose along with the glucose – and if you eat anything with sugar in it, that’s usually true – most of it ends up processed into fat by the liver.
The real question, however, isn’t how body fat is added, the real question is why doesn’t the body burn it. Gaining weight is more about problems burning fat rather than problems adding fat, though they are somewhat related.
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