1. Sauna, sweat and science II - do we sweat what we drink?
- Author
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Zech M, Benesch M, Hepp J, Polifka S, and Glaser B
- Subjects
- Adult, Body Water chemistry, Deuterium analysis, Gases, Humans, Hydrogen urine, Male, Mass Spectrometry, Middle Aged, Oxygen Isotopes analysis, Oxygen Isotopes urine, Beverages, Hydrogen analysis, Steam Bath, Sweat chemistry
- Abstract
Inspired by a previous 'Sauna, sweat and science' study [Zech et al. Isot Environ Health Stud. 2015;51(3):439-447] and out of curiosity and enthusiasm for stable isotope and sauna research we aimed at answering the question 'do we sweat (isotopically) what we drink'? We, therefore, pulse-labelled five test persons in a sauna experiment with beverages that were
2 H-enriched at about +25,600 ‰. Sweat samples were collected during six sauna rounds and the hydrogen isotope composition δ2 Hsweat was determined using an isotope ratio mass spectrometer. Before pulse labelling, δ2 Hsweat H pulse in sweat after pulse labelling and2 H-depleted vapour. The absence of a clearly detectable2 H pulse in sweat after pulse labelling and δ2 Hsweat results of ≤+250 ‰ due to a fast2 H equilibration with body water are moreover a clearly negative answer to our research question also in a short-term consideration. Given that the recovery of the tracer based on an isotope mass balance calculation is clearly below 100 %, we finally answer the question 'where did the rest of the tracer go?'- Published
- 2019
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