Fresh apple

 is a food item found in Fallout 3. It can restore some of your hit points without radiating you.

Locations

 * Fresh apples and all other fresh items are mostly found in Rivet City Science Lab. There are four apples here but be aware that taking them is a crime. Dogmeat can get them for you with no negative Karma.
 * One can be found in the ladies' room of Arlington Library, at the base of the garbage can.