Bone density, also known as bone mineral density, refers to the amount of mineral content within a certain volume of bone tissue. It is an important indicator of bone health and strength, as low bone density can lead to conditions such as osteoporosis and an increased risk of fractures. Research in the field of bone density focuses on understanding the factors that influence bone density, such as genetics, age, gender, diet, and physical activity. This research aims to develop strategies for preventing and treating osteoporosis and other bone-related conditions, as well as improving overall bone health and quality of life. Methods for measuring bone density include dual-energy X-ray absorptiometry (DXA) and quantitative ultrasound.