BIA

BIA (bioelectrical impedance analysis) estimates body composition — fat mass, lean mass, and body water — by measuring how a small, harmless electrical current moves through tissue. It's commonly used in scales, handheld devices, and clinical settings as a faster, more accessible alternative to a DXA scan, though it's generally considered less precise. It's often used to track trends in body composition over time during GLP-1 treatment, rather than as a one-time diagnostic measure.