Published guidelines

The European Society for Parenteral and Enteral Nutrition (ESPEN) Guidelines 2018 guidelines

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The ESPEN Nutrition Therapy for critically ill patients across the Asia-Pacific and Middle East Regions 2017 Guidelines

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The American Society for Parenteral and Enteral Nutrition (ASPEN) guidelines 2016

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ESPEN 2018 Prescription Guidance

Phase   Acute Acute Late
Period   Early Late Chronic
Days   1 to 3 3 to 7 > 7
Protein g/kg/day   1.3 1.3  
Energy Indirect Calorimetry < 70% 80-100%  
  Predictive equations < 70% < 70%  

ASPEN Guidelines 2016

Target per kg/day based on BMI
BMI Protein (g) Protein Weight Reference Energy (Kcal) Energy Weight Reference
BMI Protein (g) Protein Weight Reference Energy (Kcal) Energy Weight Reference
< 30 1.2–2 ABW 25–30 ABW
30–40 2 IBW 11–14 ABW
40–50 2.5 IBW 11–14 ABW
> 50 2.5 IBW 22–25 IBW

Note: scroll right to see more data