An apple a day keeps the doctor away…right? Maybe not. According to the Environmental Working Group, apples are just one of 12 commonly eaten fruits and veggies that have high traces of chemical pesticides, even after they've been peeled and pulped for your baby. The answer? Give children organic forms of these produce. Sticking to organic versions of foods like lettuce, potatoes, strawberries, and grapes—in fresh, juiced, and even dried forms—can reduce exposure to pesticides by a whopping 90percent. Organic versions of eggs, meat, poultry, rice, dairy products and baby food are also a much safer bet than their chemical-laden counterparts. On the other hand, when it comes to a score of other produce, plus pasta, you can safely buy non-organic. You can also keep costs down by shopping at farmer’s markets, food coops, and discount chains like Trader Joe’s, and by opting for locally grown and in-season items whenever possible.

Here's the EW's list of the "dirty dozen" foods to buy organic, and the dozen that will not give your baby a dose of pesticide if you buy conventional varieties:

12 Foods to Buy Organic

Apples
Bell Peppers
Celery
Cherries
Grapes (that means raisins and juice too)
Lettuce
Nectarines
Peaches
Pears
Potatoes
Spinach
Strawberries
Plus: eggs, meat, poultry, dairy, baby food, rice.

12 Foods You Don't Need to Worry About

Asparagus
Avocado
Bananas
Broccoli
Cabbage
Eggplant
Frozen Sweet Peas
Kiwi
Mango
Onions
Pineapples
Watermelon