Oxidative Stress

What is Oxidative Stress?

Oxidative stress is an imbalance between free radicals and antioxidants in the body. When the body produces more free radicals than the antioxidants can manage, oxidative stress occurs. This phenomenon has been linked to ageing and several chronic diseases, including cardiovascular diseases, cancer, and neurodegenerative disorders.

How does it work in the body?

Oxidative stress arises as a natural part of the body's metabolism, but it can also be triggered by external factors such as environmental pollution, tobacco smoke, radiation, and certain chemicals. Free radicals are formed when oxygen is metabolised, and they can attack cell components such as DNA, lipids, and proteins, leading to cellular damage and dysfunction.

Scientific benefits

Many studies have investigated the relationship between oxidative stress and health-related conditions. Here are some key findings:

• Cancer: Oxidative stress has been linked to DNA damage that can lead to cancer development.
• Neurodegenerative diseases: Research has shown that oxidative stress plays a role in the development of diseases such as Alzheimer's and Parkinson's.

Dosage and recommendations

There is no universal recommendation for antioxidant dosage, as the need may vary depending on individual factors such as diet, lifestyle, and health status. Generally, it is recommended to obtain antioxidants through a balanced diet that includes a variety of fruits and vegetables. If you are considering taking supplements, you should consult a healthcare provider to determine the appropriate dosage.

Best sources and forms

Antioxidants are found in a wide range of foods, and the most effective sources include:

• Fruits: Berries (blueberries, raspberries), citrus fruits (oranges, lemon juice), and apples.
• Vegetables: Spinach, kale, broccoli, and red bell peppers.
• Nuts and seeds: Walnuts, almonds, and sunflower seeds.
• Spices: Turmeric and ginger have also been shown to have antioxidant properties.

Side effects and warnings

Although antioxidants are important for health, excessive consumption of supplements can lead to adverse effects. Therefore, it is important to adhere to recommended doses and always consult a doctor before starting new supplements.

Frequently asked questions

What is the difference between free radicals and antioxidants?

Can I get enough antioxidants through my diet?

Yes, a balanced diet rich in fruits and vegetables can provide sufficient amounts of antioxidants for most people.

What symptoms may indicate oxidative stress?

It is important to consult a doctor for proper diagnosis and treatment.

Is oxidative stress linked to ageing?

Can I take antioxidants as supplements?

Yes, but it is important to consult a doctor before starting supplements, especially if you have underlying health conditions.