Bone density refers to the amount of mineral content, primarily calcium, in a specific volume of bone. It is an important measure of bone strength and health. Higher bone density means stronger bones, which are less likely to break or fracture. Factors such as age, diet, and physical activity can influence bone density, making it crucial to maintain a healthy lifestyle for optimal bone health. As people age, especially women after menopause, bone density can decrease, leading to conditions like osteoporosis. This condition makes bones fragile and increases the risk of fractures. Regular exercise, a balanced diet rich in calcium and vitamin D, and avoiding smoking can help improve and maintain bone density throughout life.