There’s a new warning about sunscreen as many people get ready to head to the beach this Memorial Day weekend.

A recent study from Consumer Reports found a third of sunscreen tested had less SPF than what was printed on the bottle.

"I think it's a big concern," says West Babylon resident Marion Rosado. "Because people are using it for protecting their children and if it's not what they're saying it claims to be, then it just isn't right to the public."

This week, the FDA acknowledged the problem and vowed to re-evaluate its testing requirements saying, "That starts with making sure that products marketed to offer protection from the sun's effects actually deliver these promises." 

Doctors say the findings are troublesome, but should not stop beachgoers from wearing the strongest SPF sunscreen when heading outside.