What is a DEXA Scan?

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A Dual-Energy X-ray Absorptiometry (DEXA) scan is a non-invasive imaging technique used to measure body composition. It provides detailed insights into:

• Bone mineral density (BMD): Used to diagnose osteoporosis and assess fracture risk.

• Lean body mass (LBM): Represents muscle mass, critical for overall metabolic and functional health.

• Fat mass: Differentiates between visceral adipose tissue (VAT, fat surrounding internal organs) and subcutaneous fat.

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Measuring visceral fat is critical because excess fat surrounding internal organs is strongly linked to metabolic syndrome, insulin resistance, and cardiovascular disease. Bone density assessment helps diagnose osteoporosis and reduce fracture risk by monitoring bone health. Additionally, muscle mass evaluation identifies sarcopenia or sarcopenic obesity, which are significant risk factors for poor metabolic health and physical frailty. Its accuracy makes DEXA essential for diagnosing, monitoring, and tailoring treatments for chronic conditions.

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Supported by research: (Mazess et al., 1990), (Zhang et al., 2015), (Kim, 2022).