Popular sunscreens contain a dangerous substance called benzophenone, which builds up in the body over time and can cause cell mutations, cancer, and endocrine disruption.
Scientists at the Sorbonne University in France presented their findings in an article published in the journal Chemical Research in Toxicology.
Scientists have determined benzophenone concentrations in 17 sunscreens from 9 French manufacturers - Nivea, Garnier, LaRoche-Posay, and 8 US firms - Coppertone, Banana Leaf, and Neutrogena. All products except Nivea contained octocrylene, which absorbs ultraviolet radiation.
During the study, samples of the creams were stored in an incubator for six weeks at 40 degrees Celsius at 75% relative humidity. It corresponds to the storage of the cream for a year at room temperature.
All 16 octocrylene-containing creams were found to have benzophenone at concentrations ranging from 6 to 186 micrograms per kilogram. Benzophenone is produced from octocrylene through a retro aldol condensation reaction. Moreover, 70% of the benzophenone contained in creams can be absorbed through the skin.
The authors argue that the circulation of funds with octocrylene should be banned until proven safe.
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