Just recently, a study was published showing that sunscreens cannot fully prevent skin cancer development. It was further stated that the said study was co-authored by Berta López Sánchez-Laorden.
Even sun protection factor (SPF) 50 sunscreens cannot thwart the development of melanoma, according to the study. It further demonstrates that sunscreen is effective against sunburn but it cannot completely stop the radiation from penetrating and damaging the DNA cells and thus cause cancer.
Genetically modified mice were used. These mice were susceptible to melanoma. During the research, it was found out that the harmful ultraviolet light causes in p53 – the DNA of melanocytes in a gene. The said gene has great importance since it guards the genome, which is responsible in detecting and repairing cell damages.
Other epidemiological studies illustrate the relationship between the increased risk of melanoma and too much sun exposure. Sadly, the cause or how it happens still unclear.