Fig. 1.

Recommendations for protein intake (a) and energy intake (b) from birth until 6 months corrected age represented as means with ranges (colored dotted lines) from parenteral (blue) and enteral (red) nutrition. Vertical dotted lines represent the “transition period” from 32 to 34 weeks postconceptional age to term age when energy intake may be (gradually) lowered to 115 kcal kg⁻¹ day⁻¹ with a protein intake of ≥ 3 g kg⁻¹ day⁻¹, provided that growth is age appropriate (i.e., 10–15 g kg⁻¹s day⁻¹ for at least 1 week) [45, 47]. Total protein intake from combined parenteral and enteral nutrition should not exceed 4.5 g kg⁻¹ day⁻¹; total energy intake from combined parenteral and enteral nutrition should not exceed 135 kcal kg⁻¹ day⁻¹