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LeanBodyMass

Meaning

Lean Body Mass (LBM) is a clinical metric representing the total weight of the body minus all fat mass, encompassing the weight of muscle, bone, water, and all internal organs. LBM is a critical indicator of metabolic health and overall vitality, as muscle tissue is the primary site of glucose metabolism and contributes significantly to basal metabolic rate. Maintaining or increasing LBM is a central goal in hormonal health and longevity protocols, as its decline, known as sarcopenia, is a major driver of frailty and metabolic dysfunction with age.