Molecular hydrogen (H₂) has garnered significant attention in recent years as a potential therapeutic agent for various medical conditions, particularly those involving oxidative stress and inflammation. Initially considered biologically inert, H₂ has been found to possess antioxidant and anti-inflammatory properties that may confer neuroprotective effects. This report explores the current understanding of molecular hydrogen inhalation therapy and its implications for brain health, summarizing key research findings and discussing future directions.