ノート
Effect of Temperature on Changes in the Concentration of H2 in Commercial Hydrogen Water
2019 年 45 巻 6 号 p. 344-349
詳細
2019 年 45 巻 6 号 p. 344-349
In 2007, the first report that hydrogen removes active oxygen was published, and many clinical and non-clinical studies have since been conducted using hydrogen gas and water. Dietary supplements are used by a large number of patients as self-medication. Although dietary supplements cannot be considered as drugs, patients expect pharmacological benefits from them since they usually have very little knowledge of their effects. Thus, pharmacists have the responsibility to expand their knowledge of dietary supplements so that they can give better advice to patients who are using them.
This study examined the effect of temperature on the dissolved H2 concentration in water and clarified the difference in changes in H2 concentration among commercial hydrogen water products. We compared 5 commercial hydrogen water products packed in aluminum pouches (Product A, Product B, Product C), aluminum cans (Product D) or plastic bottles (Product E), and measured the dissolved H2 concentration for up to 120 days when stored at 26℃ and 37℃ using a needle-type H2 sensor. We found that the H2 dissolved in Product A was stable for 120 days at 26℃ and 37℃. Product B and C maintained high H2 concentrations at 26℃, but the H2 concentration gradually decreased at 37℃. The H2 concentrations of products D and E were low and undetectable, respectively. Our experiments suggest that all products packed in aluminum pouches, aluminum cans or plastic bottles stored during distribution at 26℃ and 37℃ may be influenced by the time course of changes in the concentration of hydrogen.
