Food scientists are shedding light on items loaded with toxins and chemicals–and simple swaps for a cleaner diet and supersized health.

Clean eating means choosing fruits, vegetables, and meats that are raised, grown, and sold with minimal processing. Often they’re organic, and rarely (if ever) should they contain additives. But in some cases, the methods of today’s food producers are neither clean nor sustainable. The result is damage to our health, the environment, or both. So we decided to take a fresh look at food through the eyes of the people who spend their lives uncovering what’s safe–or not–to eat. We asked them a simple question: “What foods do you avoid?” Their answers don’t necessarily make up a “banned foods” list. But reaching for the suggested alternatives might bring you better health–and peace of mind.

1. The Endocrinologist Won’t Eat: Canned Tomatoes

2. The Farmer Won’t Eat: Corn-Fed Beef

3. The Toxicologist Won’t Eat: Microwave Popcorn

4. The Farm Director Won’t Eat: Nonorganic Potatoes

5. The Fisheries Expert Won’t Eat: Farmed Salmon

6. The Cancer Researcher Won’t Drink: Milk Produced With Artificial Hormones

7. The Organic-Foods Expert Won’t Eat: Conventional Apples

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