Of course its SAFE. Molecular hydrogen (h2) is a very clever antioxidant, it can selectively neutralize the damaging ROS and then become water to be eliminated by the body. Besides, hydrogen is not a foreign substance, it produce by the human body naturally.
Humans can produce up to 10 liters of H2 a day with a good diet containing fruits, vegetables, and fiber-rich foods. This is due to the production of H2 by our gut flora (gut bacteria). However, there is a constant battle inside our body, virtually all of us have too high levels of oxidative stress but with too little h2 to defend and eventually we lose the battle. This is the primary cause of all kinds of degenerative diseases as well as more susceptible to infectious diseases.
Everyone, including children, is exposed to oxidative stress, which has been linked to the pathogenesis of nearly all disease conditions from cardiovascular diseases, neurological disorder, digestive disorder, diabetes, arthritis, migraine, bad mood, anxiety, depression, Parkinson’s disease, eczema, cancer and many others.
Taking antioxidants such as vitamin C, vitamin E, CoQ10 are good to reduce high levels of oxidative stress. However, the size does matter, molecular hydrogen (h2) is 88 times smaller than vitamin C, indeed it is the smallest antioxidant known to science. Due to the tiny size, it can effectively cross the blood-brain-barrier, neutralize the damaging free radicals inside the cells and DNAs, then the by-product is water to be eliminated by the body.
All ages of people are encouraged to drink hydrogen-rich water everyday. However, it is important to note that the concentration of dissolved hydrogen is important. Researches confirmed that in order to reap the maximum benefits, the drinking water must be infused with at least 1000ppB and indeed the best water ionizer in the market can produce up to 1600ppB dissolved hydrogen. The higher concentration of hydrogen simply means stronger antioxidant potency to deliver better health and beauty efficacy! So, the side effect of drinking hydrogen-rich water is you will age slower!