Comment by CGMthrowaway

Lots of fruit skins are very edible (kiwis etc.), but they are covered with pesticides. All conventional fruits are.

If you look at the "Dirty Dozen" vs. "Clean Fifteen" lists of fruits/veggies that come out every year, you'll notice that the cleanest fruits are almost always ones that grow with a thick skin or covering, or are covered by soil: banana, pineapple, avocado, corn, (shelled) peas, watermelon, carrot, potato, etc.

And the dirtiest ones have a thin or no skin: greens, stone fruit, blackberries, strawberries, apples, pears etc.

The clean fruits aren't really any cleaner, the study just tests the "edible" part minus the outer skin. If you eat the skin of conventional Clean Fifteen, you might as well be eating a Dirty Dozen.