A pilot study conducted by the Center for assessment and research the drugs division of the Department for control over food products and medicines USA (FDA) revealed that some components of sunscreen are released into the bloodstream at levels high enough to initiate a state investigation.
This study also showed that the concentration of the studied ingredients continued to increase as daily consumption of drugs. Scientists say that traces of these substances remain in the body for at least 24 hours after use of sunscreen.
The basis for this project began four chemicals – avobenzone, oxybenzone, ecamsule (organic compound, which is added to many sunscreens to filter UVA rays) and octocrylene. According to a recent statement by the FDA, these ingredient you need to investigate before they can be considered “safe and effective”.
“We need to conduct studies to evaluate this finding to determine if there is a true medical effects in the absorption of certain sunscreen ingredients,” said a dermatologist at the Yale school of medicine Dr. David Leffell, the representative of the American Academy of dermatology. He added that at the same time, people should continue to take all possible measures to protect against the harmful effects of sunlight.
In the new FDA study involved 24 healthy volunteers, which were randomly selected sunscreen spray or lotion containing avobenzone, oxybenzone or octocrylene as ingredients or sunscreen for the face containing organic compound AKUMAL.
Volunteers were asked to apply the assigned sunscreen to 75% of their body four times a day for four days. Thirty blood samples were taken from each volunteer for seven days. Of the six people who use the cream of ecamsule, five level of chemical substances in the blood was considered to be statistically significant by the end of the first day. For the other three chemicals, particularly oxybenzone, for all volunteers noted significant levels already after the first day of use.
By studying the table of results of a study can highlight one more thing regarding oxybenzone, according to Dr. Andrews. The concentration of oxybenzone was 50-100 times higher than that of any of the three other chemicals that they tested.
In 2008, the U.S. centers for control and prevention of diseases of the analyzed urine samples collected in the framework of the state research, and found that oxybenzone is present in 97% of samples. Since then, studies have shown a potential link between oxybenzone and lower levels of testosterone in adolescent boys, the hormonal changes in men and a shorter pregnancy and a violation of the weight at birth in children.
The European Union has largely replaced the oxybenzone in your sunscreen new substances which block the more dangerous UVB and UVA rays. But these products have not passed the safety tests required for FDA approval. Thus, oxybenzone stays on the market of cosmetic ingredients.
The next step will be appropriately developed through clinical trials in industry protocols to test the safety and determine the optimal dose for preventing cancer of the skin while respecting the balance of risk and benefit from the application. In addition, special attention deserves the question of the absorption of cosmetic ingredients in infants and children, who have different proportion of surface area of the body and whose skin can absorb substances at different speeds.