Yes. A restricted carbohydrate diet has been proven to raise good cholesterol and lower bad.
Also: high cholesterol is not an indicator of pending disease. The particle size of the cholesterol is more important. A low-carbohydrate diet is better for fully cholesterol.
Carbs: 4 calories per gram
Protein: 4 calories per gram
Fat: 9 calories per gram
Lowering carbs and upping the fat doesn’t reduce the calories one is eating. Perhaps it results in less appetite, resulting in fewer calories. But that’s different than asserting that one eats fewer (not LESS! GRR!) calories because one no longer eats carbs.
A. No, I don’t have a thread on this topic.
B. I don’t have a theory. Other people do.
C. This is General Questions. I have answered with facts in response to the OP and other posts.