Figure 1  Environmental factors like pollution and UV radiation are key triggers for oxidative stress, accelerating aging and cellular damage

Introduction: The Power of Antioxidants

Every day, our body is under attack—not from visible enemies, but from invisible ones called free radicals. We need Antioxidants and Free radicals. These molecules cause cellular damage, ageing, and even chronic diseases like diabetes, hypertension, and cancer. To combat these harmful effects, our body relies on potent compounds called antioxidants.

The antioxidants help neutralise free radicals effectively in our cells. While our body naturally produces some antioxidants, we need additional ones from external sources, such as fresh fruits, vegetables, and dietary supplements.

Understanding about the Free Radicals and their effect

Free radicals are produced due to improper metabolism, a process that occurs during metabolic processes in the body. Our body balances the Antioxidants and free radicals. Free radicals are produced in different ways. Such as pollution, smoking, UV exposure, and unhealthy diets.


But did you know free radicals aren't all bad?

In small amounts, free radicals help our immune system defend against infections. This imbalance is the root cause of many chronic and degenerative diseases.

 

Why Are Antioxidants Important?

Those who have diabetes, hypertension and many different chronic and acute diseases. Often have higher oxidative stress levels. This means their bodies generate more free radicals than those of healthy individuals, thereby increasing their need for antioxidants.

Illustration showing DNA strand breaking due to oxidative stress

Figure 2 Oxidative stress can cause DNA damage, leading to mutations and chronic diseases like cancer and neurodegeneration.

Free radicals can damage:

  • DNA
  • Cell membranes
  • Mitochondria
  • Vital organs

Due to oxidative stress, its effects on our body organs contribute to ageing and systemic diseases. Regular intake of antioxidants helps reduce this damage, slows ageing, and protects long-term health.

 

Top Natural Sources of Antioxidants

Fruits and vegetables rich in antioxidants like berries, spinach, and nuts

Figure 3 A diet rich in natural antioxidants helps neutralize free radicals and protect the body from oxidative stress.

1. Blueberries

Among all berries, blueberries are considered the richest in antioxidants. They are high in anthocyanins, which support brain health, reduce inflammation, and fight oxidative stress.

2. Dark Chocolate

High-quality dark chocolate (with 70% or more cocoa) is packed with antioxidants, particularly flavonoids. Some research helps us gain a lot of insight into its effects and inflammatory conditions.

3. Artichokes

Artichokes are highly nutritious and rich in antioxidants, especially when boiled or steamed, as this cooking method increases their antioxidant content. They support liver function and digestive health.

4. Astaxanthin

Often found in marine life, such as salmon and krill, astaxanthin is considered one of the most potent natural antioxidants, with a very high ORAC (Oxygen Radical Absorbance Capacity) value. Astaxanthin acts as an antioxidant, which balances the levels of Antioxidants and free radicals.

Essential Antioxidant Nutrients and Supplements

🔹 Vitamin C

Known for its role in boosting immunity (especially during the COVID-19 pandemic), Vitamin C is available in supplement form and also in natural fruits like citrus fruits.

🔹 Vitamin E

A fat-soluble antioxidant, Vitamin E, protects cell membranes and skin health. It's an excellent antioxidant, and it's available in many other foods. Still, it is primarily found in spinach, as well as in fresh seeds, nuts, and other fruits and vegetables.

🔹 Coenzyme Q10 (CoQ10)

Coenzyme Q10, also known as CoQ10, plays a crucial role in producing cellular energy during metabolism and acts as a potent antioxidant. Its levels naturally decrease with age. It's found in red meat, organ meats, oily fish, and some nuts and vegetables.

🔹 Glutathione

Often called the "master antioxidant," Glutathione is produced by our body and plays a central role in detoxification and immune defence. However, stress, poor diet, and age can reduce their levels.

🔹 Minerals with Antioxidant Properties

  • Zinc
  • Selenium
  • Manganese

These minerals help support antioxidant enzymes in the body and play roles in immune function and inflammation control.

Daily Antioxidant Intake: Are You Getting Enough?

Ask yourself: Are you consuming enough antioxidants daily to reduce oxidative stress?

Most people don't realise that free radical damage builds silently over time and only shows symptoms once significant damage occurs, such as memory loss, chronic fatigue, or disease onset. Consuming fresh, antioxidant-rich foods now is an investment in your long-term health.

 

Conclusion:

Fight Oxidative Stress Before It Fights You

We can't altogether avoid free radicals, but we can reduce their harmful effects. Here's how:

Do you know that we cannot avoid free radicals because they are even produced during our metabolic process? Additionally, there are other ways, such as pollution and chemicals, that we cannot prevent. However, we can minimise its effect.

·       Having fresh fruits and vegetables daily

·       Including nuts, seeds, and whole grains

·       Choose natural supplements if needed

·       Get fresh air, regular exercise, and sleep

Remember, your body is your most important asset. Protect it with a powerful shield of antioxidants to age gracefully and stay disease-free.

References:

1.     Syed Saqib Ali, Haseeb Ahsan, Mohammad Khalid Zia, Understanding oxidants and antioxidants: Classical team with new players, J Food Biochem, 2020 Mar;44(3):e13145, doi: 10.1111/jfbc. 13145. Epub 2020 Jan 20.

2.     Bahare Salehi, Miquel Martorell, Jack L Arbiser, Antioxidants: Positive or Negative Actors?, Biomolecules. 2018 Oct 25;8(4):124. doi: 10.3390/biom8040124.

3.     William L. Stone; Tram Pham; Shamim S. Mohiuddin.Biochemistry, Antioxidants, https://www.ncbi.nlm.nih.gov/books/NBK541064/.

4.     İlhami Gulcin, Antioxidants: a comprehensive review, Arch Toxicol, 2025 May;99(5):1893-1997, doi: 10.1007/s00204-025-03997-2. Epub 2025 Apr 15.

5.     Jolanta Flieger, Wojciech Flieger, Antioxidants: Classification, Natural Sources, Activity/Capacity Measurements, and Usefulness for the Synthesis of Nanoparticles, Materials (Basel). 2021 Jul 25;14(15):4135. doi: 10.3390/ma14154135.