What is oxidative stress and why does it matter today more than ever?

We live longer than ever before. But we also live more exposed than ever before.

The air we breathe, modern diet, constant stress, lack of rest, or environmental pollution influence a silent process that occurs inside our body every day.

This process is called oxidative stress .

It's invisible. It's not felt immediately. But it profoundly influences how our cells age and how our bodies function in the long term.

Free radicals: necessary, but delicate

To understand oxidative stress, you first need to understand what free radicals are .

Free radicals are unstable molecules that are naturally generated in our bodies, especially in processes related to oxygen. Because they are unstable, they seek to stabilize themselves by reacting with other nearby molecules.

For a long time they were spoken of only in a negative light, but the reality is more nuanced.

👉 In small quantities and under control, free radicals perform important functions.

For example:

• The immune system is used to attack bacteria and viruses
  
  

• They help to destroy infected or abnormal cells
  
  

• Participate in normal cell signaling processes.
  
  

In this context, free radicals are not enemies , but tools that the body uses in a precise and localized way.

Where does the problem arise?

The problem arises when that balance is broken.

When the body generates more free radicals than it can control , or when its antioxidant systems are insufficient, the radicals stop acting in a localized way and begin to circulate freely.

At that point:

• They no longer attack only pathogens or damaged cells
  
  

• They begin to damage healthy cells
  
  

• They affect proteins, lipids, and DNA
  
  

• Cellular aging is accelerated
  
  

We call this imbalance oxidative stress .

Why are we more exposed today than ever before?

Oxidative stress has always existed, but today it is amplified by factors inherent to modern lifestyle:

• Environmental pollution
  
  

• Ultra-processed food
  
  

• Chronic stress
  
  

• Lack of rest
  
  

• Persistent inflammation
  
  

• Constant exposure to toxins
  
  

Our body still has defense mechanisms, but they are no longer always sufficient to compensate for this constant burden.

The role of antioxidants: restoring balance

This is where antioxidants come in .

Antioxidants help neutralize excess free radicals and restore balance , without completely eliminating processes that are still necessary for the body.

The key is not to "eliminate all free radicals", but to regulate them .

That's why science today is paying attention to antioxidants that:

• Do not act indiscriminately
  
  

• They do not block necessary physiological processes.
  
  

• They can reach the interior of the cell.
  
  

Molecular hydrogen: a different approach

Since 2007, various scientific studies have begun to investigate molecular hydrogen (H₂) as an antioxidant.

What sparked the interest of the scientific community was that:

• It is the smallest known molecule
  
  

• It can easily pass through cell membranes
  
  

• It acts selectively , neutralizing the most reactive and harmful radicals.
  
  

Instead of interfering with normal bodily processes, molecular hydrogen helps reduce excess oxidative stress by maintaining cellular balance.

📚 Scientific reference: Ohsawa et al., Nature Medicine , 2007.