Research
Mixed
Gut microbiota composition influences the efficacy of metabolic treatments like bariatric surgery and metformin, and contributes to vagal desensitization in obesity.
If you are on metformin or had bariatric surgery, your gut bacteria matter. A diet that supports a healthy microbiome can enhance the effectiveness of these treatments. Conversely, a poor diet may contribute to 'vagal desensitization,' making weight loss harder.
ModerateSupportsMEDIUM confidence
manipulations of the gut microbiome can directly impact host metabolic homeostasis and influence the success of other treatment options, such as gastric bypass surgery and metformin... other studies have implicated changes in the gut microbiota as a contributor to vagal afferent desensitization during HFD feeding.
Why this rating
The paper is a review citing multiple studies; specific causal mechanisms in humans are still being elucidated.
Source
Role of the gut–brain axis in energy and glucose metabolism
Hallie R. Wachsmuth et al. · Experimental & Molecular Medicine · 2022
DOI 10.1038/s12276-021-00677-w
narrative_reviewCited 243×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Gut-derived GLP-1 signaling via vagal afferents regulates hepatic glucose production and postprandial glycemia, independent of direct pancreatic insulin secretion.Good
- Vagal afferent signaling regarding food intake is primarily driven by mechanoreceptors (IGLEs) sensing intestinal stretch, rather than chemoreceptors sensing gut peptides like GLP-1.Good
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
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