Both UVB and UVA radiation can give rise to ROS-related point mutations (e.g. G to T) and crude genomic alterations (e.g. deletions) which may not be recognized as caused by
UV radiation. Copyright 2002 S. Karger AG, Basel
UVA's do not heat the skin, but penetrate in-depth and provoke irreversible damage to the skin::
Intolerance reactions and age spots on the face, décolleté and hands.;
"Actinic" ageing which accelerates the skin's natural ageing process (formation of deep wrinkles, loss of firmness)
However, the ultimate danger is when the skin capital, under the strain of excessive exposure to the sun, runs out. It can no longer assure the defence of DNA of the skin's cells. A carcinogenic process can therefore be triggered.