If you trust your source, then you could get coarse sponge and really wash the carrots well. The non organic carrots get sprayed with a variety of poisons. Just rinse off a non-organic carrot under the tap, then peel another. Eat the peeled one first, then try the unpeeled one. Which one is sweeter? If I buy the young carrots with their tops still on, I usually use the scrubbing sponge and give them a vigorous scrub before using them, if I don’t want to peel them. For juicing, we don’t peel carrots, but we DO scrub them well.