Macro partitioning
Low dietary fiber intake increases the abundance of the gut bacterium Collinsella, which is positively correlated with circulating insulin levels in overweight and obese pregnant women.
If you are overweight or obese and pregnant, ensuring adequate dietary fiber intake (aiming for >28g/day as recommended) may help maintain a healthier gut microbiota balance by keeping Collinsella levels low. This is associated with lower circulating insulin levels, which may support better metabolic health during pregnancy. Focus on increasing fiber from whole food sources rather than supplements.
Collinsella abundance correlated positively with circulating insulin (rho D 0.30, p D 0.0006), independent of maternal BMI, but negatively with dietary fiber intake (rho D ¡0.20, p D 0.025) in this cohort.
Why this rating
Observational cohort study with validated sequencing (16S rRNA and qPCR) and statistical correlation, but not a randomized controlled trial establishing causality.
Source
Low dietary fiber intake increases<i>Collinsella</i>abundance in the gut microbiota of overweight and obese pregnant women
Luisa F. Gómez-Arango et al. · Gut Microbes · 2017
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