Objective:

To summarize recent findings in bariatric physiology, focusing on gut-brain communication pathways altered by bariatric surgery and experimental weight-loss therapies, highlighting their clinical significance.

Key Findings:

• Postbariatric excess weight loss (EWL) outcomes vary widely, influenced by factors like brain connectivity and individual physiological responses.
• Bariatric surgery alters nutrient-sensing mechanisms, enhancing gut hormone release, which is crucial for weight loss.
• Changes in gastrointestinal cell types and their signaling roles are significant post-surgery, impacting metabolic regulation.
• The internal GI environment is influenced by diet, microbiota, and surgery, affecting metabolic outcomes and patient responses.

Interpretation:

Understanding the physiological changes in nutrient sensing and gut-brain communication post-surgery can help identify specific targets for optimizing obesity therapy, potentially leading to personalized treatment approaches.

Limitations:

• Subjectivity in article selection may influence interpretations and applications of findings, potentially skewing the review's conclusions.
• The review lacks a systematic bibliographic search strategy, which may limit the comprehensiveness of the included studies.

Conclusion:

The review highlights the importance of gut-brain communication and nutrient sensing in postbariatric outcomes, suggesting specific avenues for future research and therapeutic strategies to enhance patient outcomes.