Immunonutrition showed no clear difference in organ failure compared with control (low certainty).
It is very uncertain whether immunonutrition changes adverse events compared with control (very low certainty).
It is very uncertain whether probiotics changes all‐cause mortality compared with control (very low certainty).
It is very uncertain whether probiotics changes systemic inflammatory response syndrome compared with control (very low certainty).
It is very uncertain whether probiotics changes organ failure compared with control (very low certainty).
Probiotics showed no clear difference in adverse events compared with control (low certainty).
It is very uncertain whether probiotics changes serious adverse events compared with control (very low certainty).