Scientists from Rutgers University exposed hairless mice to ultraviolet light, then rubbed several creams into their skin. They used Eucerin, Dermabase, Dermovan and Vanicream lotions.
Results showed that mice treated with moisturizers grew 69 percent more tumors than untreated mice.
Some researchers think certain ingredients in the creams may increase growth of damaged skin cells, leading to more tumors. Others think it is just bad science because the group of untreated mice also developed tumors.