Mixed
Obesity is associated with a gut microbiota composition characterized by a lower proportion of Bacteroidetes and a higher proportion of Firmicutes compared to lean individuals, a pattern observed in both murine models and human studies.
Focus on a diverse, fiber-rich diet rather than trying to target specific bacterial ratios, as the relationship between microbiota and obesity is complex and not fully understood in humans. Dietary patterns that support microbial diversity (e.g., high fiber) are more actionable than trying to manipulate specific phyla ratios.
obese individuals possessing a lower proportion of Bacteroidetes and higher levels of Firmicutes than their lean counterparts, thus resembling the patterns established in previous murine studies.
Why this rating
The paper reviews multiple studies showing consistent trends in animals and some in humans, but also highlights conflicting human data and lack of statistical significance in some cohorts.
Source
The gut microbiota and its relationship to diet and obesity
Siobhan F. Clarke et al. · Gut Microbes · 2012
DOI 10.4161/gmic.20168
More from this paper
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- Bariatric surgery, specifically gastric bypass, significantly alters gut microbiota composition, often increasing Bacteroides/Prevotella and decreasing Firmicutes, which may contribute to sustained weight loss.Good
Related findings · Mixed
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- 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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