The ppm number on a bottle of Deuterium Depleted Water (DDW) is one of the most important details to understand when comparing products. If a bottle is labelled 25ppm or 50ppm, the number refers to the approximate concentration of deuterium in the water. Both are lower-deuterium options compared with ordinary drinking water, but 25ppm contains less deuterium than 50ppm. That is the main difference between the two. This article explains what ppm means, how 25ppm and 50ppm comp

What Is Deuterium Depleted Water (DDW) and What Do 25ppm and 50ppm Mean? Deuterium Depleted Water sounds technical at first, but the basic idea is simple: it is drinking water that has been specially processed to contain less deuterium than ordinary water. For people comparing premium water options, DDW sits in a different category from standard bottled spring water or filtered water. It is not defined by where it comes from, flavouring, mineral content, or packaging. It is d