The basis of the health benefits of Hydrogen enriched water, or simply Hydrogen Water is – you guessed it right – Hydrogen. So first let’s go through a few facts about Hydrogen – It is the lightest and smallest molecule in the universe. Almost all the other elements in the world – like gold, copper, lead, oxygen and so on – began their life as hydrogen. Even our Sun – the source of almost all the energy on this planet – is mostly made up of Hydrogen. In the stars, the high temperature causes hydrogen to combine with other hydrogen nuclei to form heavier elements like helium, carbon and even some metals.