To visually assess your body fat percentage, do not rely on generic online charts; use benchmarks based on laboratory measurements (DEXA and bioelectrical impedance) conducted under a strict fasted protocol.

noli's read

Jeff Nippard is correct to emphasize the inaccuracy of traditional visual estimations: an observational study from the University of Nebraska (Eckerson et al., 1992) confirms that visual assessment of body fat shows high variability between observers. Furthermore, his use of a strict fasted protocol is scientifically validated by industry expert opinions (Plus10 Life, 2026), as hydration fluctuations distort bioelectrical impedance analysis (BIA). Regarding the reference measurement, the DEXA technology used is recognized by scientific consensus as highly accurate for analyzing body composition. However, the claim that a visual chart can serve as a universal benchmark is slightly overstated, as genetics, muscle mass, and fat distribution vary from one person to another, altering the visual appearance at an equal percentage. Finally, experts note that even the DEXA scan has an inherent margin of error of 1% to 2% (Protocol, 2026). This approach by Jeff Nippard remains an excellent effort in popular science, far more rigorous than standard online tools.

the sources

No named source held this one up — that absence is part of the verdict.