By Dr. Priyom Bose, Ph.D. Reviewed by Lauren Hardaker Apr 1 2026 A simple fiber supplement could reshape the gut microbiome, stabilize blood sugar spikes, and even prevent preterm births in high-risk pregnancies, offering a promising new path for precision prenatal care.  Study: Dietary fiber supplementation mitigates gestational diabetes risk and preterm birth via gut microbiota modulation: a randomized controlled trial . Image credit: dilyaz/Shutterstock.com A new study in  Frontiers in