Gut Microbiome Linked to Bone Loss

Researchers led by Professor Roberto Pacifici at Emory University School of Medicine have discovered a crucial link between the gut microbiome and bone density variability in patients with primary hyperparathyroidism (PHPT). The study, published in List of Nature Research journals on May 25, 2026, identified Bifidobacterium longum as a key bacterial species that influences bone loss by stimulating inflammatory immune cells (TNF-producing T cells and Th17 cells). Through fecal microbiota transfer experiments in mice, the team demonstrated that microbiota from osteoporotic PHPT patients caused greater bone loss and increased inflammatory immune cells. This research suggests that the gut microbiome actively determines the severity of bone loss in PHPT patients, opening new avenues for microbiome-based biomarkers for risk prediction and targeted therapeutic interventions, such as precision probiotics or selective microbial modulation.