Several risk factors can contribute to low bone mineral density (BMD) or osteoporosis. These include advancing age, female gender, family history of osteoporosis, menopause (due to hormonal changes), low body weight or body mass index (BMI), sedentary lifestyle, smoking, excessive alcohol consumption, long-term use of certain medications (such as glucocorticoids), certain medical conditions (such as rheumatoid arthritis or celiac disease), and inadequate intake of calcium and vitamin D. Additionally, individuals with a history of fractures or those with a history of falling are also considered at risk. It's important to be aware of these risk factors and make necessary lifestyle modifications, seek appropriate medical care, and undergo regular BMD testing if indicated, especially if multiple risk factors are present.