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Is bone mass the same as bone density? Exploring the key differences

According to the National Osteoporosis Foundation, about 54 million Americans are living with osteoporosis and low bone mass. Often used interchangeably, **is bone mass the same as bone density**? While closely related, the terms refer to distinct aspects of skeletal health, with bone mass representing the total quantity of bone tissue, and bone density measuring the concentration of minerals within that tissue.