Molecular hydrogen (H₂) has emerged as a promising subject of research due to its potential therapeutic and technological applications. In medicine, molecular hydrogen has been recognized for its antioxidant properties, capable of neutralizing harmful free radicals and modulating cellular pathways that enhance oxidative stress defenses. Clinical studies have shown its potential benefits in conditions like metabolic syndrome, cardiovascular diseases, and neurodegenerative disorders. For instance, hydrogen-rich water has demonstrated positive effects on patients with rheumatoid arthritis and metabolic syndrome. Beyond its biological applications, molecular hydrogen is also of great interest in materials science. Under extreme pressures, it can transition into metallic hydrogen, which holds promise for use in energy storage, superconductivity, and other advanced technologies. Despite these potential applications, challenges remain in efficiently storing and delivering molecular hydrogen, particularly due to its low boiling point and high diffusivity. As research progresses, molecular hydrogen may open new frontiers in both medicine and energy technologies.