Why does hydrogen water supplementation for a short period of time have a sustained effect?

After drinking hydrogen water, hydrogen lasts for a short time in the body, no more than 3 hours in the human body. The animal has a faster breathing cycle and a shorter duration. The reason for the sustained effect may be the activation of other signal pathways in the body. This activated physiological pathway has a continuous characteristic, similar to the long-term effects of anesthetic gases and drugs. This effect should be related to gene expression or protein activity. Relevant studies on the role of hydrogen in preventing diseases can explain this, for example, if rats are given hydrogen for 7 consecutive days, and after 24 hours (at this time, there is basically no hydrogen in the body), the animals are given cerebral ischemia. The degree of ischemia is reduced in mice, which may be a proof of sustained effect.