Unless they’re natural, apples have likely been showered with manufactured bug sprays. In the US, the Environmental Protection Agency requires that they be washed with a detergent answer for two minutes and altogether flushed before they get sold to purchasers. While that disposes of microscopic organisms and soil it doesn’t wash away the pesticides
The scientists set out to test three distinctive washing styles. They splashed natural Gala apples with the fungicide thiabendazole and the bug spray phosphate—both of which are EPA-endorsed for use on apples—and let the organic product sit for 24 hours. They at that point washed every apple with plain water, a sanitizer arrangement normally utilized by US organic product purveyors, and an answer of water with 1% preparing pop. For each of the three choices, they tried both a two-and an eight-minute wash before flushing every apple again with water.
After two minutes, baking soda had removed more pesticides than the other two methods. (In fact, plain water was more effective than the bleach solution.) The baking soda solution cleared off all of the thiabendazole from the apple skins after 12 and all of the phosmet after 15 minutes. That said, by that point, small amounts of pesticide had seeped through the apple skin and into the flesh, so even washing fruit thoroughly won’t prevent you from low levels of chemical exposure.
Though thiabendazole and phosmet might be toxic in very large quantities, they are safe for human consumption at the levels they’re typically used at for apple farming, according to the EPA (pdf). But if you really want to minimize your exposure, the study suggests, wash them in a mixture of one teaspoon of baking soda for every two cups of water.
Peeling them also works, though trace levels of chemicals will have gone into the fruit itself, but however, you maybe missing out on some of the fiber and vitamins in the skin.