What is oxidative stress ?
Free radicals are unstable molecules naturally produced by the body. In moderate amounts, they take part in certain functions of the body, such as immune defence. However, when they are produced in excess, they can contribute to altering certain cellular structures. This is what is known as oxidative stress. It occurs when the body produces more free radicals than it can neutralise with antioxidants.
This imbalance can be promoted by several factors:
- Prolonged exposure to pollution, especially fine particles¹
- Exposure to tobacco
- Prolonged sun exposure
- Consumption of alcohol, refined sugar or saturated fats
- Exposure to everyday chemicals (cosmetics, hygiene products, household products, etc.)
- Certain medicinal treatments
- Intense physical activity
Oxidative stress is therefore a natural phenomenon, but it becomes problematic when it exceeds the body's protective capacities. Free radicals can then contribute to altering lipids, proteins and DNA, taking part in cellular ageing. The body produces antioxidants to counter this phenomenon, but when free radical production is too high, a targeted intake of antioxidant nutrients can help protect cells against oxidative stress.