JACKSONVILLE, Fla. — New research show that some popular brands of sunscreen may actually accelerate skin cancer, instead of protecting your skin.

For years, experts have been telling people to apply and reapply sunscreen, especially when facing the sun’s harmful rays. According to a new study by the Environmental Working Group released Monday, almost half of the most popular sunscreen contain ingredients that could actually speed up cancer.

Those like Ashley Rolling, who said she uses sunscreen religiously, said despite the new research, she will continue using the product.

“I don’t know how much I believe that, I mean, have they tested the study thoroughly or what evidence do they have to back it up? That’s what I would ask,” she said.