Good bacteria, stronger bones: AIIMS study finds gut link to osteoporosis

New Delhi: Your bones may not just depend on calcium or exercise to stay healthy. What’s happening in your gut could also matter.In a finding that could reshape how doctors understand bone health, researchers at AIIMS Delhi have discovered that a molecule produced in the gut can help protect bones from inflammation-driven damage, offering a potential path to tackle osteoporosis.Osteoporosis is a condition where bones become weak and fragile, increasing the risk of fractures even from minor falls. It affects millions worldwide, especially older adults, and is often linked to ageing, hormonal changes and poor nutrition.The study, published in the journal Biomedicine & Pharmacotherapy, was led by Dr Rupesh K Srivastava and his team -- Sumedha Yadav, Swati Rajput, Chaman Saini, Megha Sharma and Pradyumna K Mishra.Researchers focused on deoxycholic acid (DCA), a compound naturally produced in the gut. They found that it not only improves bone strength but also reduces inflammation and restores balance in gut bacteria — highlighting a strong gut-bone connection.Lead author Dr Srivastava, of the department of biotechnology at AIIMS, said: “DCA is a bile acid that is already present in our body and is produced through the action of gut bacteria. Under normal conditions, bile acids are made in the liver, stored in the gallbladder, and released during digestion, with about 95% reabsorbed. A small fraction is converted by gut microbes into secondary bile acids like DCA. In our study, we found that levels of these bile acids, including DCA, are reduced in patients with osteoporosis and bone loss.”He added that when tested, DCA showed a strong dual effect—“it suppressed bone-resorbing cells (osteoclasts) and boosted bone-forming cells (osteoblasts), leading to improved bone formation.” In animal models of inflammation-induced bone loss, DCA significantly reduced bone damage and regulated key pathways involved in bone metabolism.The findings are based on animal studies conducted on mice and have not yet been tested in humans.The study showed that DCA improved bone density and structure, while also reducing harmful inflammatory signals. At the same time, it strengthened the gut lining and helped restore healthy bacteria. These findings reinforce the concept of the importance of the “gut-bone” axis in health.Dr Srivastava said the research points to two possible future approaches: either supplement DCA directly or enhance the gut bacteria that naturally produce it. However, he cautioned that clinical trials are needed before it can be used in patients.In simple terms, inflammation in the body speeds up bone breakdown and weakens bones over time. The researchers found that DCA helps correct this imbalance by slowing bone loss and boosting bone formation.Scientists say this “gut-bone connection” could change how bone diseases are treated in the future. For now, the message is clear. “Caring for your gut may be as vital to bone health as calcium intake and physical activity,” Dr Srivastava said.