7 foods you should never buy organic

There are several reasons why it's best to buy organic, but buying organic may not always be best!

You might be used to paying extra for avocado, but don't buy organic. According to Cheat Sheet, their thick skin protects them from pesticides.

The same goes for pineapple, cantaloupe, and kiwis. Lisa Lee Freeman, a savings expert at Flipp, says never buy organic seafood either -- because organic seafood is farmed, not caught, wild-caught fish is healthier.

Pests don't like the bitter taste of asparagus, so it's less likely to need pesticide protection. It's also why Cheat Sheet suggests not buying organic onions.

So, what should you buy? Freeman suggests buying grass-fed meat.

Related: Food shopping on a budget

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The Environmental Working Group has identified 12 fruits and vegetables you should be buying organic and 12 fruits and vegetables that are least likely to be contaminated with pesticide residues.

Peaches: Buy Organic

Image Credit: Stuart Minzey/ Getty Images

Apples: Buy Organic

Image Credit: Digital Vision/ Getty Images

Sweet Bell Peppers: Buy Organic

Image Credit: Steve Wisbauer/ Getty Images

Celery: Buy Organic

Image Credit: Ursula Alter/ Getty Images

Nectarines: Buy Organic

Image Credit: Rosemary Calvert/ Getty Images

Strawberries: Buy Organic

Image Credit: Lew Robertson/ Getty Images

Cherries: Buy Organic

Image Credit: Chris Stein/ Getty Images

Pears: Buy Organic

Image Credit: Sasha Bell/ Getty Images

Grapes: Buy Organic

Image Credit: Echo/ Getty Images

Spinach: Buy Organic

Image Credit: Rob MacDougall/ Getty Images

Lettuce: Buy Organic

Image Credit: Visuals Unlimited Inc./ Inga Spence/ Getty Images

Potatoes: Buy Organic

Image Credit: Adam Gault/ Getty Images

Papaya: Don't Buy Organic

Image Credit: Riou/ Getty Images

Broccoli: Don't Buy Organic

Image Credit: Mint Images/Tim Pannell/ Getty Images

Cabbage: Don't Buy Organic

Image Credit: Mint Images/ Tim Pannell/ Getty Images

Bananas: Don't Buy Organic

Image Credit: Andrew Dernie/ Getty Images

Kiwi: Don't Buy Organic

Image Credit: Paul Frederiksen Jr./ Getty Images

Frozen Sweet Peas: Don't Buy Organic

Image Credit: Kroeger Gross/ Getty Images

Asparagus: Don't Buy Organic

Image Credit: Bill Deering/ Getty Images

Mango: Don't Buy Organic

Image Credit: Rosemary Calvert/ Getty Images

Pineapple: Don't Buy Organic

Image Credit: Rosemary Calvert/ Getty Images

Frozen Corn: Don't Buy Organic

Image Credit: Richard Clark/ Getty Images

Avocado: Don't Buy Organic

Image Credit: Rick Lew/ Getty Images

Onions: Don't Buy Organic

Image Credit: Phillip Hayson/ Getty Images

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