A Rutgers University study said when exposed to caffeine and moderate exercise, mice were better able to eliminate precancerous cells on their skin.
Researchers said the hairless mice were exposed to ultraviolet-B radiation lamps, given caffeniated water and plenty of exercise.
The results showed mice that drank caffeine or exercised experienced a 100-percent increase in pre-skin cancer cell fighting abilities.
While the mice that did both experienced almost a 400-percent increase.
Researchers hope the findings can help the fight against all forms of cancer, but warn against putting away the sunscreen just yet.