Original sentence: At this time, sunscreen is not tested (in Europe, Japan and Australia) for photocarcinogenic effects before it is released onto the market.Changed behaviour of the sunscreen user due to a fake sense of safety.Furthermore it is important to know that those tests for photocarcinogenic properties are comparing two test animals that stay in the sun for the same amount of time.In reality the cause of melanoma is the indirect DNA damage not the sunburn-causing direct DNA damage.Since they are not afraid of a sunburn the sunscreen-users stay in the sun much longer and therefore they are exposed to a larger dose of radiation.Skin penetration through the epidermal barrier and the ensuing photosensitization effect of sunscreen.This has been proven wrong several times (see for example ).Today it is well established that sunscreen does penetrate the epidermal barrier into the human skin in amounts which are large enough to cause serious damage due to an increase of photogenerated free radicals.UVB radiation stimulates the skin to generate more protective melanin
Edited sentence: (1) changed behaviour of the sunscreen user due to a fake sense of safety.(2) Skin penetration through the epidermal barrier and the ensuing photosensitization effect of sunscreen.Furthermore it is important to know that those tests for photocarcinogenic properties are comparing two test animals that stay in the sun  for the same amount of time.In reality the cause of melanoma is the indirect DNA damage not the sunburn-causing.Since they are not afraid of a sunburn the sunscreen-users stay in the sun much longer and.This has been proven wrong several times (see for example.Today it is well established that sunscreen does penetrate the epidermal barrier into the human skin in amounts which are large.UV-B radiation stimulates the skin to generate more protective melanin.Unfortunately sunscreen is not tested (in Europe, Japan and Australia) for photocarcinogenic effects before it is released onto the market.direct DNA damage.enough to cause serious damage due to an increase of photogenerated free radicals.therefore they are exposed to a larger dose of radiation