A water ionizer, which is also often called an alkaline ionizer, is a home appliance which raises the pH of drinking water. Proponents claim a variety of health benefits from consuming water that has been alkalized and ionized similar to the alternative health practice of alkaline diets. These benefits include slowing the ageing process, disease prevention and even protection from nuclear fallout.
The fact is that the pH of your system is an important element of good health. So, it only makes sense that the pH of your water is an important factor in your health regimen.
These machines first became popular in Japan and other Far Eastern countries. Their popularity soon spread to the U.S. and Europe and continues to spread around the world.