Tag Archives: oxidative stress

Antioxidants vs Free Radicals

We all know that oxygen is essential for all life…

But did you know that, as well as being an absolute necessity for our survival, its use in the body can also result in the production of certain unwanted by-products? They are known as oxidants. Some of these oxidants will act as free radicals.

Free radicals are unstable molecules that can damage DNA and cell structure. They cause harm because they are constantly trying to stabilise themselves by attempting to ‘steal’ electrons from nearby molecules. This, in turn, damages those molecules and makes them unstable too, causing them to also seek out other electrons in order to become stable again. And so, a vicious circle is created.

Free radicals are produced as a result of both internal (endogenous) and external (exogenous) factors. Endogenous free radicals are produced as a result of normal biological processes, like aerobic respiration, metabolism and inflammation. In contrast, exogenous free radicals are produced as a result of environmental factors, like:

  • pollution,
  • sunlight,
  • stress,
  • UV rays,
  • poor diet,
  • alcohol intake,
  • smoking,
  • strenuous exercise
  • and X-rays.

Unfortunately, in our modern age, filled with ever-present pollutants and toxins, both in the environment and in the foods we eat, the levels of free radicals within our bodies are higher than they have ever been before. It is impossible to avoid damage from free radicals, and our body’s own defences against it are not foolproof.

When the levels of free radicals within our bodies exceed the protective capabilities of those defences, it results in a phenomenon known as “oxidative stress” which means that the defence system is no longer able to readily detoxify or to repair the occurring damage.

As the time goes on, cell parts which have become damaged by process of oxidation accumulate, contributing to the toxic load of the body as well as speeding up the processes of ageing and causing a further stress on the immune system.

Our bodies are really amazing in terms of being capable to run many complex processes which keep us healthy and in a harmonious balance. One of the main keys to staying healthy revolves around providing our bodies with as much nutritional support as we can, in order to fuel our natural defences. Our primary line of defence against free radicals are antioxidants – substances that help counteract the damaging effects of oxidation in tissue.

What are antioxidants?

Antioxidants are nutrients (vitamins, minerals, carotenoids, polyphenols and other phyto-chemicals), as well as enzymes (proteins in the body that assist in chemical reactions). While it is not entirely clear how antioxidants work, their most important characteristic in terms of supporting the body against free radicals is that they are stable with or without the extra electron, so they can help to stop the chain reaction (or the vicious circle) referred to above. These beneficial compounds are present in many natural, whole foods (such as fruit and vegetables).

In many cases, it is possible to identify antioxidant-rich sources through their distinctively bright colours. For instance:

  • the deep red of cherries;
  • the deep purple of beetroot;
  • the bright orange of carrots;
  • the yellow of turmeric;
  • and the blue-purple of blueberries, blackberries and grapes.

Vitamin C and vitamin E are two of the most potent antioxidants found in nature, present in high levels in foods such as parsley, rosehips, elderberries, blackcurrants, citrus fruits, broccoli, nuts and whole grains (like oatmeal, rye, barley). Foods that have exceptionally high levels of antioxidants are often referred to as “superfoods” or “superfruits”, for that reason. The most common examples of those are: green tea, acai berries and wheatgrass.

How to support the level of antioxidants within your body?

Our bodies produce metabolic enzymes that are extremely effective antioxidants but their capability of sufficient production drops dramatically in our twenties. Likewise, if we are adding to the free radical production though our lifestyles, it is a good idea to support the antioxidant levels through external (dietary) sources.

Antioxidant foods
Eating a balanced diet, rich in a variety of seasonal (preferably organic) fruits, vegetables, green leafy plants and whole grains, is one of the best ways to support your body’s antioxidant levels.

However, if you feel that you need additional support due to your life and health circumstances, a more concentrated intake, or a more convenient and reliable source, food-based antioxidant supplements can be the perfect solution.

You can find plenty of antioxidant options to suit your lifestyle and healthcare needs in our eBay shop.