Celery and bell peppers

Photo: Thinkstock

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Produce: Peppers and Celery
Both veggies react to pesticides in the same way: like a sponge, absorbing the chemicals through the skin. Because of this, you won't be able to reduce chemical ingestion by washing or peeling them. Always choose the organic variety.

Cost: Organic peppers and celery cost between $3.99 and $6.99 per pound at grocery stores.