'carb-heavy' originates from the combination of 'carb,' a colloquial abbreviation of 'carbohydrate,' and 'heavy,' meaning 'having a lot of.'

The term 'carb-heavy' evolved from the increasing awareness of dietary components, particularly carbohydrates, in modern nutrition discussions.

Initially, it referred to foods with a high carbohydrate content, and this meaning has remained consistent in modern usage.