“It is inescapable-we are always breathing or drinking a tiny amount of it.” However, he continued, “that doesn’t mean that it should be in consumer products, nor should they be manufactured in any way that produces or uses benzene.” What remains uncertain is how benzene-a colorless chemical that’s commonly used to make other chemicals-may have gotten into sunscreens in the first place. “Benzene is a naturally occurring substance,” said Goldstein. In the study, the researchers concluded that further studies were needed to determine the clinical significance of this finding, and they noted that their findings to date “do not indicate that individuals should refrain from the use of sunscreen.”
Active ingredients in sunscreens generally degrade over time, in part according to the amount and types of UV radiation they’re exposed to.) In some cases, these active ingredients were still detectable in varying concentrations in the participants’ blood for days after the sunscreens’ last application. (As a means of control, the participants were not exposed to the sun for up to seven total days. In a May 2019 study, researchers at the FDA confirmed that avobenzone, oxybenzone, octocrylene, and ecamsule-four of the most common ingredients in chemical sunscreens and combination formulas-remained in the bloodstreams of 24 adult study participants who were assigned to reapply one of four commercially available sunscreens four times a day for four days in the lab. Researchers have long known that some chemical UV filters can reach the bloodstream, and they have detected varying amounts of these active ingredients in urine and breast milk. This is not how people typically use sunscreen. In all of these cases, to achieve accurate test results, the researchers must apply the sunscreens in precise amounts and distribute them uniformly across the test surfaces. Labs that test sunscreens also examine how the formulas perform when applied to acrylic plates, quantifying the amount of UV radiation that passes through. The FDA requires that these tests be done on at least 10 people. Labs that test sunscreens recruit volunteers who are exposed to UV radiation from sun lamps while wearing sunscreen and not wearing it (and, in the case of “water-resistant” formulas, wearing these sunscreens before and after water exposure). Among other things, the FDA considers lab data on a given sunscreen’s SPF value, broad-spectrum protection, and water resistance. To obtain marketing approval from the agency, sunscreen makers must submit data showing that their products are safe and effective. The FDA regulates sunscreens as over-the-counter drugs. Goldstein, former dean of the University of Pittsburgh Graduate School of Public Health.
We also spoke with toxicologist Luoping Zhang, an adjunct professor at the University of California Berkeley, as well as environmental toxicologist Bernard D.
#COOLA SUNSCREEN FOR FACE SKIN#
And we consulted 10 dermatologists: Jenna Lester, an assistant professor of dermatology at the University of California San Francisco School of Medicine’s department of dermatology Vinod Nambudiri, a dermatologist at Brigham and Women’s Hospital in Boston Belinda Tan, a dermatopathologist and co-founder of People Science Lawrence Eichenfield, chief of the pediatric and adolescent dermatology division at Rady Children’s Hospital–San Diego Rachel Herschenfeld of Dermatology Partners in Wellesley, Massachusetts Steven Wang of Hoag Memorial Hospital Presbyterian (PDF) in Newport Beach, California, who leads the Skin Cancer Foundation’s photobiology committee Lindsey Bordone of ColumbiaDoctors in New York City Erin Warshaw, a professor of dermatology at the University of Minnesota Medical School pediatric dermatologist Patricia Treadwell of Indiana University dermatologist Henry Lim, a Detroit-based Skin Cancer Foundation spokesperson and Sophie Balk, a pediatrician at the Children’s Hospital at Montefiore, a professor of pediatrics at Albert Einstein College of Medicine, and a spokesperson for the American Academy of Pediatrics. We also spoke with Lisa Quale, a health educator at the University of Arizona Cancer Center. To find the best sunscreens, we spoke with cosmetic chemists Ron Robinson, Akshay Talati, and Perry Romanowski.
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