You can only steer what you measure. The number on the scale says nothing about what really matters: how much muscle, fat and water. Multi-frequency bioelectrical impedance passes a very low current through the body to estimate its composition — and above all to track its change.

Beyond weight: body composition

Two people of the same weight can have radically different compositions. What matters for energy, performance and longevity is the lean/fat ratio, hydration and phase angle (an indicator of cellular quality).

Measurement reliability

Multi-frequency bioelectrical impedance is strongly correlated with DXA (the body-composition reference): r ≈ 0.97 for fat mass and lean mass.

Key data

r ≈ 0.97
Correlation with DXA
Under standardized conditions (hydration, time of day), multi-frequency impedance estimates fat and lean mass with a very high correlation to DXA (Frontiers in Nutrition, 2024).
Tracking
What it does best
Its real strength is not the absolute value but tracking over time: under constant conditions, it faithfully captures the evolution of your body composition throughout the protocol.

Why it is central to a protocol

At Superhuman Wellness

Body-composition analysis opens every journey: it sets your baseline, then guides the re-measurements that make your progress objective.

Sources
Reliability, biological variability, and accuracy of multi-frequency bioelectrical impedance analysis, Frontiers in Nutrition, 2024 (PMC11649400).