Não pelos hidratos de carbono (incluindo açúcar) ou proteínas (pelo menos em ratos):
https://www.thesun.co.uk/news/6796218/fatty-foods-science-study-not-carbs/
Citando:
"of the problem is that it is very difficult to do studies on humans where what they eat is controlled for long enough periods to work out what are the most important factors.
But studies on animals that are similar to us can help point in the right direction.
The study, published today in the journal Cell Metabolismand includes 30 different diets that vary in their fat, carbohydrate (sugar) and protein contents.
Professor John Speakman, who led the study, said: “The result of this enormous study was unequivocal – the only thing that made the mice get fat was eating more fat in their diets.
“Carbohydrates including up to 30 per cent of calories coming from sugar had no effect."
