Oxidative Stress Markers

Stress, pollution, exhaustion, and unhealthy lifestyle habits can quietly disrupt cellular balance and lead to consequences that often go unnoticed. An oxidative stress markers test reveals whether your body is under strain and how effective your natural defense system is against damage. At IntroLab in Belgrade, a detailed assessment is available that includes six key parameters, providing a comprehensive picture of your current condition. Schedule your test today and find out if your body needs additional support.

What Is Oxidative Stress?

Oxidative stress is a condition characterized by an imbalance between free radicals and antioxidants in the body. Free radicals are unstable molecules that naturally form during breathing, digestion, and other bodily processes. In moderate amounts, they are not harmful, but when present in excess, they can damage cells, proteins, lipids, and DNA.

Antioxidants are substances that neutralize free radicals and prevent their harmful effects. When antioxidant levels are too low, the body enters a state of oxidative stress, which increases the risk of various health issues – including chronic fatigue, inflammation, weakened immunity, heart disease, and accelerated aging.

Long-term exposure to oxidative stress often goes unnoticed, and its effects accumulate over time. That’s why it’s important to monitor your antioxidant status early.

Symptoms of Elevated Oxidative Stress

High levels of oxidative stress may manifest as:

• Chronic fatigue
• Slower recovery and regeneration
• Weakened immunity and frequent infections
• Skin problems (dryness, dull complexion, premature aging)
• Brain fog and difficulty concentrating
• Poor sleep and increased irritability
• Accelerated biological aging in athletes, smokers, and those exposed to pollution

Prolonged oxidative stress can also be present without obvious symptoms, which is why laboratory testing is valuable even for preventive purposes.

What Does Oxidative Stress Markers Test Include?

The oxidative stress markers analysis at IntroLab includes six specific parameters that together provide a comprehensive overview of the body’s ability to protect itself.

1. TAS (Total Antioxidant Status / Capacity)

This parameter measures the body’s overall ability to defend against free radicals, reflecting the contribution of proteins, uric acid, vitamins C and E, and other reducing agents in the blood. A higher TAS indicates strong antioxidant defense, while lower values suggest a potential risk of oxidative stress – even in individuals who appear clinically healthy.

Reference range: 900–1400 μmol/L

2. TOP (Total Oxidative Potential / Status)

TOP measures the concentration of oxidizing substances such as hydrogen peroxide and lipid hydroperoxides. This parameter is a direct indicator of harmful molecules that can damage cells, tissues, and DNA. When combined with TAS, it provides a clear picture of the balance between damaging and protective factors.

Reference range: 6–20 μmol/L

3. TAS/TOP Index

This index represents the calculated ratio between antioxidant capacity and present oxidative load. A low value (below 100) indicates that the body is producing more free radicals than it can neutralize, signaling an increased risk of cellular damage.

Reference range: Greater than 100

4. PAB (Pro-oxidant–Antioxidant Balance)

Unlike individual measurements, PAB simultaneously assesses both oxidative and antioxidant components, providing insight into the current balance within the body. Elevated PAB indicates an accumulation of harmful substances such as hydrogen peroxide, which may increase the risk of chronic diseases, inflammatory conditions, and cellular damage.

Reference range: 0–80 U/L

5. SOD (Superoxide Dismutase)

SOD is the most important enzymatic antioxidant in the body. Its role is to neutralize the superoxide anion – one of the primary causes of oxidative damage. Optimal activity of this enzyme is essential for preserving cellular function and protecting the body during infections, inflammation, and exposure to toxins.

Reference range: 90–180 U/L

6. GSH (Glutathione)

Glutathione is the body’s primary intracellular antioxidant, known for its ability to directly neutralize free radicals and detoxify the system. A decrease in GSH levels leads to weakened immune function, faster fatigue, higher risk of inflammation, and slower recovery from stress or illness. Due to its protective role, GSH is also used in modern therapies, including IV treatments for detox and anti-aging.

• Reference range for women: 4.8–10.5 μmol/gHb
• Reference range for men: 4.4–9.8 μmol/gHb

How to Reduce Oxidative Stress

Preventing and reducing oxidative stress involves making healthy lifestyle changes:

• A diet rich in antioxidants (fruits, vegetables, nuts, whole grains)
• Moderate physical activity
• Reducing exposure to toxins (tobacco smoke, alcohol, pollution)
• Stress management (yoga, meditation, nature walks)
• Quality sleep and rest
• Supplementation (vitamin C, E, selenium, zinc, glutathione – under medical supervision)

Oxidative Stress and Diabetes

In people with diabetes, oxidative stress is often present and is associated with the development of complications such as damage to blood vessels, nerves, and kidneys. Elevated blood glucose levels stimulate the production of free radicals while simultaneously impairing the function of protective antioxidant enzymes.

Monitoring oxidative stress markers in individuals with diabetes can contribute to better condition management, slowing the progression of complications, and timely implementation of personalized therapeutic measures.

How to Prepare for Oxidative Stress Markers Testing

For accurate and reliable results of oxidative stress markers testing, the following preparation is recommended:

• Arrive on an empty stomach (no food for 8–12 hours)
• Avoid physical exertion the day before the test
• Do not consume alcohol or smoke within 24 hours prior to testing
• Pause antioxidant supplements (e.g., vitamin C, E, glutathione) 2–3 days before the test, unless otherwise advised by your doctor
• The sample is taken from a vein (venous blood)

For more information and personalized advice, feel free to contact the IntroLab team when scheduling your appointment.

Contact Us and Test Your Oxidative Stress Levels

You can schedule an oxidative stress markers test at IntroLab in Belgrade. Our professional staff will help you interpret the results accurately and, if needed, guide you on the next steps for maintaining your health. Take control of your well-being — book your appointment at IntroLab today.