Ozonated Water: Does It Really Have Therapeutic Properties?

In recent years, claims suggesting that ozonated water may offer therapeutic benefits — even for serious health conditions — have become increasingly popular. These claims are often based on biochemical mechanisms involving reactive oxygen species (ROS), but they are frequently presented without the necessary scientific context.

In this article, we explore what ozone actually is, how it interacts with biological systems, what is currently known about ozonated water, and why therapeutic claims surrounding it require careful scientific evaluation.

What Is Ozone and Why Is It Considered Biologically “Active”?

Ozone (O₃), also known as triatomic oxygen, belongs to the group of reactive oxygen species (ROS) and acts as a powerful oxidizing agent.

Because of its strong oxidative properties, ozone reacts easily with organic compounds, leading to the formation of ozonides, which may subsequently break down into aldehydes — many of which exhibit cytotoxic effects — or ketones, alongside the production of hydrogen peroxide.

These reactions are far from biologically neutral. The molecules generated through oxidation may affect cellular structures, proteins, lipids, and even genetic material.

Ozone and the Human Body: What Do We Know?

Gaseous ozone is considered toxic to the respiratory system. Even exposure to relatively low ozone concentrations may damage the lungs and irritate the eyes.

Inhaled ozone activates macrophage activity within the lungs and may trigger inflammatory responses. It has also been associated with increased activity of antioxidant enzymes such as glutathione peroxidase (GSH-Px), superoxide dismutase (SOD) and catalase (CAT).

These responses appear to reflect the body’s attempt to counteract oxidative stress caused by ozone exposure.

Does Ozonated Water Have Therapeutic Benefits?

When ozone dissolves in water, it may contribute to the formation of highly reactive free radicals, including hydroxyl radicals, through reactions such as:

O₃ + H₂O + 2e⁻ → O₂ + 2OH⁻

Hydroxyl radicals are extremely reactive molecules capable of interacting non-selectively with intracellular structures.

This means they may oxidize lipids, proteins, carbohydrates, and even DNA, potentially leading to widespread oxidative modifications.

Experimental models have shown that ozonated solutions, under specific and controlled medical conditions, may influence inflammatory or cellular processes.

However, most of these findings come from laboratory or animal studies and cannot automatically be translated into evidence of safety or effectiveness for human oral consumption.

Based on current scientific evidence, there is no established proof that drinking ozonated water provides measurable health benefits. As a result, claims suggesting therapeutic properties remain unproven and may be misleading.

The Dietitian’s Perspective

In clinical practice, claims surrounding “therapeutic” foods or products are often built on isolated biochemical mechanisms without sufficient clinical evidence.

The existence of a biological effect does not automatically mean that a product is safe or beneficial for human consumption.

Regulatory Position & Safety Concerns

National Greek Organization for Medicines (EOF) has issued statements warning against promotional claims that attribute therapeutic or preventive properties to ozonated water.

According to the organization, such claims may legally fall under the definition of medicinal products and would therefore require official pharmaceutical authorization that has not been granted.

In simple terms, there is currently insufficient evidence demonstrating that ozonated water is beneficial as a drinking product or capable of replacing established medical treatments.

What Does This Mean in Practice?

The idea that a powerful oxidizing molecule could offer broad therapeutic benefits may sound appealing. In reality, however, human biology is far more complex.

One of the core principles of nutrition and biomedical science is that impressive claims require equally strong scientific evidence.

At present, available evidence does not support the idea that drinking ozonated water improves human health.

Practical Takeaways

• Therapeutic claims should always be supported by clinical evidence
• Biological activity does not automatically equal health benefit
• Products marketed for “detoxification” or broad therapeutic effects require careful evaluation
• Safety and effectiveness should be assessed through human clinical studies
• Health-related decisions should not rely solely on advertising claims

Frequently Asked Questions