Mutations to DNA caused by free radicals are a major cause of
cancer. Free radicals can also make blood clot abnormally in our
arteries by destroying our bodies ability to make prostacyclin,
a natural anti-clot hormone found in healthy arteries. Free
radicals are also implicated in arthritis. Most of the brain
damage caused by insufficient oxygen is due to free radicals.
Free radicals are also a major cause of cross-linking, which
makes tissues stiff and brittle, leading to loss of flexibility,
emphysema of the lungs, and cerebral haemorrhage. Free radicals
cause age pigment accumulation that slowly chokes brain cells to
death and results in brownish "age spots" on skin.

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