Our research on hydrogen has just been published in a recent issue of International Journal of Gerontology! We analyzed here the impact of 4-week hydrogen gas inhalation on cognitive performance in thirteen women aged 65 and above. Women received hydrogen by inhalation for 15 min once per day for 4 weeks and it appears that the intervention significantly improved cognitive function from mild dementia at baseline to normal cognition at follow up. In addition, women experienced better performance for word recall test and improved word recognition after the intervention. This pilot trial seems to corroborate previous animal studies, suggesting that gaseous hydrogen might be considered as a beneficial agent for age-related cognitive health.