Earlier quoted context omitted.
You're saying one can't lose weight on low-calorie diets that are primarily composed of carbs? In that case, we should send a single rice grain to all starving persons to serve as their only nutrition. I imagine you have a more nuanced point, but the statement you quoted is clearly true taken for what it actually is saying.
> I imagine you have a more nuanced point, but the statement you quoted is clearly true taken for what it actually is saying. You are right, of course. Without quantifying (how low is "low calorie"?) these statements are useless. There was an experiment in Mass General some 15 years ago, in which they were able to get people with similar lifestyle/activity on 1500 cal/day diet. About one third lost weight, one third…
800kcals a day is typically enough for a 100 lb person to lose nearly a half a pound of fat a week. That's low calorie by most people's measure. Certainly mine at 200lbs
When most people are talking about 'losing weight' they mean losing fat. At least losing actual body tissue. Anyone can gain or lose 10% of their body weight in a few days by controlling for carbs. But its just water.
Try to ignore rat studies if you possibly can. Their metabolism, particularly their capacity for denovo lipogenisis is very very different than that of human beings.