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. Author manuscript; available in PMC: 2022 Dec 20.
Published in final edited form as: Science. 2022 Nov 24;378(6622):909–915. doi: 10.1126/science.abm8668

Fig. 1.

Fig. 1.

(A) Conceptual diagram showing sources of water influx and efflux on human body. * Metabolic water produced inside a living organism as an end product of the oxidation of energy-containing substances in their food. (B) Hydrogen isotope dilution and elimination provides an objective measure of total body water (TBW) and water turnover (WT). DLW; doubly labeled water.