Intensive Care Unit Survivors

The goal of this clinical trial is to learn if daily oral supplementation with pasteurized Akkermansia muciniphila (PAM), an EFSA-approved food supplement, can support recovery in adults who have recently been treated in the ICU for sepsis. The main questions it aims to answer are: * Is PAM safe to take for 56 days after ICU discharge? * Does PAM increase the abundance of beneficial butyrate-producing bacteria in the gut? Researchers will compare PAM to a placebo (a capsule that looks the same but has no active ingredient) to see if PAM improves gut microbiota and immune recovery. Participants will: * Take PAM or placebo capsules once daily for 56 days * Provide stool and blood samples at baseline, day 28, and day 56 * Receive a follow-up phone call about their health 1 year after starting the study