
Start with the same unit
Do not compare directly values expressed in different units without understanding the conversion and context. If one analysis is in ppm and the other uses another reporting, ask for a technical explanation before deciding that one is "better."
Look at the date and sample
An analysis can describe a batch, a reference sample, or an internal test. The date, batch identification, and sampling conditions help understand the relevance of the result.
The method must be visible
A serious analysis is not just a number in a promotional material. The method, laboratory, or technical document allow a clearer verification of what was measured.
Conclusion
Compare equivalent information, not just numbers. And for health claims, the composition analysis must be supplemented by separate clinical evidence.
Editorial transparency
Published by MECRO SYSTEM SRL. AI tools assist drafting and translation. No named medical reviewer is attributed to this article. This educational material does not replace individual medical advice. Report an error using the contact page, including the article address and the passage concerned.
You may also like
pH, minerals and deuterium: three different thingsWhy pH, mineral content, and deuterium concentration should be read separately on a water label.
Deuterium, diet and metabolism: how we read hypothesesA balanced context about deuterium, diet and metabolism: what can studies explore and why hypotheses are not clinical recommendations.
Frequently asked questions about deuterium-depleted waterConcise answers to frequent questions about deuterium-depleted water, deuterium, ppm, and health promises.
PPM versus percentages: how to read concentrationsThe difference between ppm and percentages explained simply for correct reading of labels and water analyses.
DDW Glossary: 12 terms to understandSimple glossary for deuterium, DDW, heavy water, ppm, isotopes, placebo and other expressions found in research about water.
PPM, isotopes and a number that needs contextWhat does ppm on the label of deuterium-depleted water indicate and why the concentration is not the only relevant thing.
Deuterium: what does "stable isotope" mean?A clear guide about deuterium in water: what is a stable isotope, where it appears naturally, and what this term does not mean.
How is deuterium-depleted water produced?An explanatory overview of isotopic separation and the information a manufacturer should clearly communicate.