Obesity and the gut microbiome: Striving for causality

Area of Science:

• Microbiology and metabolic disease research.

Background:

• The gut microbiome's potential role in obesity is a growing area of scientific interest.
• Historical context and recent findings link gut bacteria to obesity phenotypes.

Purpose of the Study:

• To review the historical basis for the gut microbiome-obesity hypothesis.
• To highlight key recent findings in this research area.
• To critically discuss challenges and future directions for establishing causality.

Main Methods:

• Literature review and critical analysis of existing research.
• Examination of epidemiological and experimental studies.
• Discussion of methodological and epistemological challenges.

Main Results:

• The hypothesis linking gut microbiota to obesity has historical roots.
• Recent studies provide evidence supporting this connection.
• Defining causality remains a significant challenge in the field.

Conclusions:

• Establishing a causal link between the gut microbiome and obesity requires rigorous definition and methods.
• Further research must address the epistemological problem of causality.
• Clear definitions are crucial for advancing our understanding of microbiota's role in obesity.