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the claim

There is a standard universal mathematical formula for calculating total body water percentage

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 3 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that there is a standard universal mathematical formula for calculating total body water percentage?

No. There is no single universal mathematical formula for calculating total body water percentage; instead, researchers rely on a wide variety of population- and clinical-specific prediction equations.

Verdict: REFUTED · 0 sources for, 3 against · Last checked

The analysis

The claim states that a standard universal mathematical formula exists for calculating total body water percentage. The retrieved literature demonstrates the exact opposite: numerous distinct prediction equations are developed, validated, and used for specific demographics, age groups, and clinical populations (such as Cameroonian children, hemodialysis patients, and various adult cohorts). Furthermore, reviews note a lack of universal applicability and emphasize the necessity of population-specific models. Therefore, the claim is definitively refuted by the evidence.

Evidence against · 3
Validation of anthropometric and bioelectrical impedance analysis (BIA) equations to predict total body water in a group of Cameroonian preschool children using deuterium dilution method
2017
Studies continuously develop and validate different population-specific equations for total body water, demonstrating that no single universal standard formula exists.
Get citation
Essa’a, V. J., Dimodi, H. T., Ntsama, P. M., & Medoua, G. N. (2017). Validation of anthropometric and bioelectrical impedance analysis (BIA) equations to predict total body water in a group of Cameroonian preschool children using deuterium dilution method. doi.org. https://doi.org/10.1186/s41110-017-0045-y

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More against · 2
Validation of the SMH Equations for the Estimation of the Total Body Water Volume in Hemodialysis Patients
2022
Researchers regularly create and test new distinct predictive equations for total body water tailored to specific clinical populations, such as hemodialysis patients.
Get citation
Noori, N., Parpia, A. S., Wald, R., & Goldstein, M. B. (2022). Validation of the SMH Equations for the Estimation of the Total Body Water Volume in Hemodialysis Patients. doi.org. https://doi.org/10.1177/20543581221137180

Multi-Frequency Bioimpedance Analysis in Practice: A Review of Validated Prediction Equations for Key Body Composition Parameters.
2025
Comprehensive reviews of prediction equations for total body water reveal numerous distinct equations across studies, highlighting the need for population-specific models rather than a single universal standard.
Get citation
D, K., E, Z., & V, V. (2025). Multi-Frequency Bioimpedance Analysis in Practice: A Review of Validated Prediction Equations for Key Body Composition Parameters.. europepmc.org. https://europepmc.org/article/MED/41511100

What does the evidence say?

The claim states that a standard universal mathematical formula exists for calculating total body water percentage. The retrieved literature demonstrates the exact opposite: numerous distinct prediction equations are developed, validated, and used for specific demographics, age groups, and clinical populations (such as Cameroonian children, hemodialysis patients, and various adult cohorts). Furthermore, reviews note a lack of universal applicability and emphasize the necessity of population-specific models. Therefore, the claim is definitively refuted by the evidence.

Receipt History
first checked05 Aug 2026
judged → REFUTED · 405 Aug 2026
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