In 2013, Osaka University of Physical Medicine in Japan targeted the ischemic inflammation of the skin caused by prolonged bed rest: acne, treated with hydrogen-rich Enagic Kangenwater, which was administered by a stomach tube with Enagic Kangenwater, 600 ml per day, subject 22 people, aged 71-101 years old, had 12 patients with ideal therapeutic effects (negative reduction rate of 91.4%, far greater than 48.6% of non-users), and 10 others had improved results. This study directly demonstrates that once a day (600 ml) of hydrogen water intake, it can improve the skin wound healing ability of the elderly.