Health

What about Deionised Water? Why is it not suitable for drinking?;

What about Deionised Water? Why is it not suitable for drinking?;

In the age of eco-awareness and information , more and more consumers are choosing new solutions for clean water at home. Among solutions such as water filters, bottled or pure water, deionised water often appears, raising questions, especially about whether it is safe. Why don't we drink deionised water? What is the difference between it and filtered water? And finally, is it clean or not?;

Although deionised water is widely used in laboratories, industries and cosmetics, its consumption by humans is not recommended. Although it is pure water at the ionic level, it lacks essential minerals necessary for health. There are many people who believe that if it is pure, it is healthy water for the home, which is far from the truth.

There is a difference between deionised and filtered water, where it is consumed, where it is used and what are the best alternatives for safe water at home, like Olympus Plus water filters.

What is Deionized Water?;

When we talk about deionised water, we are referring to water from which almost all dissolved minerals such as sodium, calcium, iron, magnesium and other ions have been removed. This process is mainly done by ion exchange, reverse osmosis or electrodialysis, depending on the needs of the application. This means that deionised water does not contain any minerals found in natural water.

This is chemically «dead» water, ideal for use in electronic circuits, chemical experiments or industrial production, but not suitable for human consumption. Because of its purity, it has a strong absorption capacity, even drawing elements from the body or the containers in which it is stored.

The difference between deionized and filtered is fundamental, since filtered water retains the beneficial elements of water, removing the harmful substances, while deionized water has all of them removed. It is not just a matter of clean water, it is stripped of the elements that help the normal functioning of the body.

Why is Deionized Water Not Good for Human Consumption?;

Although deionised water seems “cleaner”, it can be quite harmful to health. The main reason? It does not contain the essential minerals and trace elements that are necessary for the proper functioning of the human body. Instead, it can act negatively in ways that are often overlooked:

  1. It does not moisturize properly: Deionized water is hypotonic compared to body fluids, i.e. without ions. This means that it is not properly absorbed and can disrupt the body's electrolyte balance. In extreme cases, it can even lead to hyponatremia, a serious disturbance in sodium levels.
  2. «Steals» minerals from the body: Because deionized water contains no ions, it has a strong ability to absorb them from anywhere it can, including the human body. Research has shown that long-term consumption can lead to deregulation of calcium, magnesium and zinc levels.
  3. It weakens teeth and bones: The clean water we consume should contain minerals such as fluoride and calcium, which contribute to healthy teeth and bones. Deionized water, on the other hand, in the long term, removes trace minerals from the enamel of the teeth, weakening them.
  4. It has no nutritional value: The lack of essential minerals and ions means that it offers absolutely nothing to the body. It does not help in the transport of nutrients, does not enhance normal cell function and generally does not benefit the health of the body in any way.

For these reasons, scientists and health organisations recommend not to consume deionised water, but to prefer alternatives such as Olympus Plus antimicrobial water filters, which are manufactured by Center Plus, offering clean and balanced water.

What is Deionised Water used for?;

Its ability to be completely free of minerals and metals makes it indispensable in applications where purity is a matter of precision or safety. It is not sterile or microbiologically clean, only ion-free water, which means it can contain bacteria if not stored properly.
Used outdoors or in environments where inorganic residues could cause damage or deterioration. Some of its main areas of use are:
● Chemical laboratories: Deionised water is used as a solvent or purification agent to avoid contamination by unwanted ions during analyses.
● Industry: It is a key ingredient for washing, cooling systems, cleaning of sensitive surfaces or parts affected by salts.
● Medical machinery: In dialysis, endoscopic instruments and sterilizers, the use of deionized water, free of microorganisms or metallic residues is critical.
● Cosmetic and pharmaceutical preparations: Used for the preparation of products that require sterile and neutral pH,
● Automotive industry: Applied to batteries, windshield cleaning systems and radiators to prevent salt build-up.
● Household appliances: In steam irons, dehumidifiers and coffee makers, it reduces the formation of deposits that wear out the appliance and affect its operation.
● In photo displays

What Are the Alternatives for Clean and Healthy Water at Home?;

The need for clean water does not mean that we should turn to scarce or dangerous options such as deionised water. Technology now provides more balanced and safer solutions that offer quality, convenience and without compromising the nutritional value of water. The options available today ensure healthy water for the home, removing harmful substances without depriving the body of essential minerals.


The most reliable solution is Olympus Plus water filters, which use advanced activated carbon and ceramic surface technology to remove chlorine, heavy metals, nitrates, pesticides and micro-organisms. At the same time, they retain elements such as magnesium and calcium, which are essential for the proper functioning of the body. The difference between deionized and filtered water is that filtered water offers safety, balance and excellent taste.


Instead of deionised water, there are safe solutions and alternatives which include reverse osmosis, which offers high purity but requires the addition of metals. This can ensure clean water while retaining beneficial minerals, making them ideal for everyday, healthy drinking at home.

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Ioannis Giotis