Hydrogen is a safe substance with ideal antioxidant properties, and it is even produced in the human gut. However, there are several ways to introduce hydrogen into the body from external sources, including ingesting hydrogen water (hydrogen dissolved in water), ingesting hydrogen encapsulated in foods such as jelly, and inhaling hydrogen gas. Among these methods, inhaling hydrogen gas is known as the most efficient way to introduce an overwhelmingly large amount of hydrogen into the body per unit of time. Our company carefully selects and handles machines that generate hydrogen gas by electrolyzing purified water.