Energy intake and energy contributions of macronutrients and major food sources among Chinese adults: CHNS 2015 and CNTCS 2015.

The study reports a lower energy intake level than CHNS 2009. Adults living in southern China or urban areas, which are relatively developed regions, or with higher socioeconomic statuses consumed less energy from carbohydrates, moderate amounts from proteins, and more from fats, indicating a need for dietary guidelines or interventions that take into account socio-demographic factors.