Objective:

To investigate how dietary intervention and probiotic supplementation affect the human fecal volatilome using comprehensive chromatographic fingerprinting.

Key Findings:

• Around 1000 features detected per sample, with approximately 270 VOCs annotated.
• Volatile compounds included short-chain fatty acids, esters, aldehydes, ketones, alcohols, terpenes, and aromatic hydrocarbons.
• Analysis expanded the catalog of known human fecal volatiles by roughly 20 percent.
• Structured shifts in volatilome profiles were observed across dietary phases and between probiotic and placebo groups.

Interpretation:

The study demonstrates that dietary changes and probiotic supplementation lead to coordinated shifts in gut microbial activity, as reflected in the fecal volatilome, highlighting the effectiveness of the analytical approach used.

Limitations:

• The study focused on a specific population (individuals with NCGWS), which may limit generalizability.
• Potential confounding factors related to individual dietary habits and microbiome diversity were not fully addressed.

Conclusion:

The integration of GC×GC-TOFMS with image-based fingerprinting is effective for capturing metabolic variations in the fecal volatilome, supporting its application in personalized nutrition research.