Free radicals

With the internationally common term "free radicals", free radicals are aggressive molecules that contain at least one unpaired electron and are very reactive. They are formed in the skin with increased intensity under sunlight.

The formation of free radicals can lead to cell and tissue damage. This process is called oxidative stress. A normal amount of free radicals is important for the organism as free radicals also destroy foreign bodies.

Free radicals can be caused by endogenous and exogenous sources. Endogenous sources include stress or injuries. Exogenous sources are smoking, alcohol or environmental pollution such as UV rays or ozone.