Literally AST and ALT are going up. This is from the same opera as swelling of the legs from carbohydrates.
That is, if an already thin person tries to lose weight even more and eats very badly for a week, then it can be difficult to return to a normal state.
If such a weirdo starts to eat normally, then from ordinary carbohydrates in his blood glucose level will rise, and glucose instantly starts the production of fat in the liver. And the liver grows fat.
In any other case, our body would allow the liver to eat up for some time, but not after hunger.
The liver is our main pantry. There are a lot of stocks there, and you constantly have to look there for economic needs.
During several days of hunger, the liver is very worried, loses weight and begins to hurt. Sometimes liver cells die, and a person already has increased liver enzymes in the blood even before the person exits starvation.
The fact is that the enzymes ALT and AST sit inside the liver cells. If liver cells burst, enzymes will spill out of them into the bloodstream.
That is, against the background of hunger, the liver becomes sick. And now, if you start to eat off carbohydrates, then the diseased liver has to work hard, assimilating the received glucose. And the liver is straining. Some of her cells decide to surrender and die prematurely. This is called apoptosis.
Well, that is, the cells are not old yet and could live, but because of the harsh working conditions, they arrange mass suicide. And enzymes from cells enter the blood.
This is usually not very scary. If ALT and AST have increased no more than 3 times from the norm, then you can not even pay attention. But some are less fortunate. Carbohydrates do not go into their mouths. Not assimilated. So be careful with a low-calorie diet. Otherwise, you can damage your liver.