1Chitkara College of Pharmacy, Chitkara University, Punjab, India
2MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana, Ambala, India
*Corresponding author: Manju Nagpal, Associate Professor, Chitkara College of Pharmacy, Chitkara University, Punjab, India
Background: Osteoporosis is a progressive skeletal disorder marked by reduced bone mass and microarchitectural deterioration, leading to increased fracture risk, particularly in postmenopausal women and the elderly. Although conventional therapies such as bisphosphonates, selective estrogen receptor modulators, and hormone replacement therapy effectively reduce fracture incidence, their long-term use may be limited by adverse effects, contraindications, and adherence issues. These concerns have prompted interest in nutraceutical approaches, including isoflavones, as supportive strategies for bone health.
Mechanism and Evidence: Isoflavones are phytoestrogens primarily derived from soybeans and legumes. Structurally similar to 17β-estradiol, they bind to estrogen receptors and influence bone remodeling. Experimental studies show that key isoflavones, particularly genistein and daidzein, reduce osteoclast-mediated bone resorption, enhance osteoblast differentiation, and modulate pathways such as RANK/RANKL/OPG and Wnt/β-catenin. They also exhibit antioxidant and anti-inflammatory effects, which may further support bone preservation. Clinical and observational evidence suggests that isoflavone intake may attenuate bone mineral density loss, especially at the lumbar spine and femoral neck, and populations consuming soy-rich diets often demonstrate lower fracture rates. However, results remain inconsistent due to variations in dosage, duration, study design, baseline hormonal status, and differences in isoflavone metabolism influenced by gut microbiota.
Conclusion: Overall, isoflavones are generally well tolerated and appear safe within dietary or recommended supplemental ranges. Current evidence supports their use as a complementary strategy rather than a replacement for standard therapy, alongside adequate calcium, vitamin D, physical activity, and lifestyle modification. Further long-term, well-designed studies are needed to define optimal dosing and patient-specific responses.
Keywords: Isoflavones, Osteoporosis, Estrogen receptor-β, Oxidative stress, Bone mineral density (BMD)
How to cite this article: Singh G, Kaur M, Mishra S, Nagpal M. Therapeutic and Preventive Potential of Isoflavones in Osteoporosis: A Comprehensive Evidence-Based Review. Int J Drug Deliv Technol. 2026;16(12s): 908-926. DOI: 10.25258/ijddt.16.12s.106
Source of support: Nil.
Conflict of interest: None