PROBLEM TO BE SOLVED: To solve the problem in which fulvic acid is a strongly acidic substance having an acidity of about 2.7, having strong acidity and astringency, and being not suitable for drinking, though various functional drinking water having functions such as health promotion and disease prevention have been proposed and commonly provided in recent years and, for example, fulvic acid is known to have various physiological activities such as thrombolytic action, and drinks containing fulvic acid are also commercially available.SOLUTION: The above-mentioned subject is solved by reduced hydrogen water characterized by containing at least fulvic acid. The reduced hydrogen water can be produced by adding metal magnesium or magnesium hydride in an aqueous solution containing fulvic acid, especially being suitably used for treating the skin with burn injury.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】近年、健康増進や病気の予防などの作用を備えた機能性飲料水が種々提案され、一般にも提供されている。例えばフルボ酸は、血栓溶解作用等、種々の生理活性を有することが知られ、フルボ酸を含む飲料等も市販されている。しかし、フルボ酸は酸性度が約2.7の強酸性物質であり、強い酸味および渋みを有し、飲用に適さないという問題点があった。【解決手段】少なくともフルボ酸を含有してなることを特徴とする還元水素水によって上記課題を解決した。該還元水素水は、フルボ酸を含有する水溶液に、金属マグネシウムまたは水素化マグネシウムを添加することにより製造でき、とくに火傷により損傷した皮膚を治療するために好適に用いられる。【選択図】図4