If it says FDA certified organic I do not trust it. You want to stay away from a lot of the big name brands such as Kraft. The less ingredients listed the better. If there are a lot of ingredients you can't read in the other ingredient list stay away from it. . I buy Amish and Newmans as well as some other brands. Organic juices would be Lakeside, R. W. Knudsen, Looza,
With produce you want to buy with the PLU code starting with 9. PLU codes starting with 4 would be farm (sprayed) any other number you are buying inferior quality or gmo which has Round Up IN the seed.
Also stay away from anything diet or artificial sweeteners like Splenda, suraclose, nutrasweet, etc.
Here are some sites that list organic vs things to avoid
Organic Products
Who Owns Organic? The Organic Corporate Brand List v1.4 | Nutrition Wonderland
Welcome | Seeds of Deception
Factory Farming Facts & the Food Industry - Important Policy News | Food, Inc
Food, Inc - YouTube
Genetic Roulette Movie Trailer - YouTube