Deuterium oxide vs. deuterium depleted

Unlike deuterium oxide (heavy water) which is a form of water that contains a larger than normal amount of the hydrogen isotope deuterium, Deuterium-depleted water (DDW), also known as light water, has a lower concentration of deuterium than occurs naturally. Deuterium a heavier isotope of hydrogen which has, in addition to its one proton, a neutron, that roughly doubles the mass of the hydrogen atom.

All natural water contains deuterium. Most water contains about 150 ppm. Water with a concentration less than 140 ppm is considered deuterium-depleted. Despite the fact that the consumption of deuterium oxide is harmful, based on clinical studies even seemingly small reduction in deuterium content can improve a number of health parameters in human.

Scientists uncovered that healthy cells react well to reduced amounts of deuterium in water. However, cancer cells are more sensitive to deuterium depletion. Cancer cells, especially tumor cells, cannot adapt rapidly resulting in tumor regression without any side effects on healthy cells. They also studied DDW for metabolic disorders - especially diabetes - with desirable results.

 

Source:

http://www.dancingwithwater.com/deuterium-depleted-water-what-is-it/

https://en.wikipedia.org/wiki/Deuterium-depleted_water