GUT MICROBIOME COMPOSITION AND NUTRIENT ABSORPTION EFFICIENCY IN COLLEGIATE ATHLETES: A CROSS-SECTIONAL STUDY

Abstract

Background: The gut microbiome is a vital component responsible for controlling digestion, nutrient uptake, and general metabolic status, particularly in physically active participants.Objective: The purpose of this research was to assess the correlation between gut microbiome diversity and nutrient absorption efficiency in college athletes. Methodology: A cross-sectional study was performed on 80 university sports department athletes aged 18–25. Fecal samples were obtained for 16S rRNA sequencing to determine microbiome diversity and quantify SCFA-producing bacteria. Nutrient intake was measured using 3-day food diaries, and nutrient absorption was assessed using hydrogen breath tests (HBT), fecal fat analysis, and blood biomarkers for iron, calcium, and vitamin D. Results: It showed a high positive correlation between gut microbial diversity (Shannon index) and protein and carbohydrate absorption, as well as with enhanced micronutrient status. Greater relative abundance of Faecalibacterium, Bifidobacterium, and Bacteroides was linked with increased bioavailability of the nutrients. Individuals with higher fiber consumption also presented with higher levels of SCFA-producing genera as well as better absorption. Conclusion: Gut microbiome composition and nutrient absorption efficiency are strongly associated in collegiate athletes as noted in this study. Increasing microbial diversity through lifestyle and diet could be a viable method to enhance nutrient uptake for optimal athletic performance