Some studies suggest that teens who have more of a common sunscreen chemical (oxybenzone) in their bodies may have lower testosterone levels, but other studies didn’t find any link to fertility problems—so it’s not clear if this really matters yet.

This study looked at many different studies and found no solid proof that sunscreen chemicals like oxybenzone lower testosterone in boys — even though one small study said they might. So, this big review says the claim isn’t backed up by enough evidence.