"Chemical Sunscreens Help Prevent Skin Cancer, But What Else Do They Do To A Body?"
An FDA study in the Journal of the American Medical Association finds that some sunscreen chemicals are also absorbed into the bloodstream at levels the FDA says requires proof that they cannot do harm. “It might be necessary to do further studies to look into the higher levels to see if they are associated with any toxicological systemic effect,” said Hooman Khorasani, MD, chief of the division of dermatologic and cosmetic surgery at the Mount Sinai Health System. Dr. Khorasani also pointed out that the study was small, just 24 volunteers who spread sunscreen over 75 percent of their body, four times a day for four days. This test was done indoors without sunlight, heat, sweat and all the other variables that could have altered the results.
— Hooman Khorasani, MD, Associate Clinical Professor, Dermatology, Chief, Division of Dermatologic and Cosmetic Surgery, Icahn School of Medicine at Mount Sinai