Can hydrogen water be drunk after being prepared for a period of time?

The flexibility and penetrating power of hydrogen have been introduced earlier. Hydrogen dissolved in water is particularly easy to escape from the water into the air. For ordinary hydrogen water, the concentration of hydrogen in water drops quickly, and the concentration of hydrogen water prepared by nanotechnology drops slowly. Therefore, it is recommended to drink hydrogen water as soon as it is produced. It is better to drink it as soon as possible after preparing the hydrogen water with a hydrogen water cup or a hydrogen water machine.