Figuring out what to avoid eating can be tricky, between news of food fraud, products packed with additives and the comings and goings of food fads. In the face of confusion, many people turn to celebrity chefs and food aficionados for their own major “don’ts” when it comes to navigating our food supply.

No Reservations host Anthony Bourdain, for instance, strongly advises against airplane food. “No one has ever felt better after eating plane food,” he told Bon Appetit. MasterChef’s insult-slinging Gordon Ramsay agrees. “There’s no f—ing way I eat on planes,” he told Refinery 29.

What else is off the table? TIME asked trusted authorities of the culinary world to share their opinions on the foods you should never, ever eat. In the process, they may have trash-talked some of your favorites.

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