They also sell lettuce (packaged and whole) to a number of national grocery chains, so it's not just the fast food and pre-packaged salads. With head lettuce, just make sure to remove several outer layers and wash inner leaves well before eating.ceberg lettuce from Taylor Farms- which supplies lettuce to Taco Bell and many other fast food chains-
Burger King, Panera, Chipotle.
Premade salads and kits are a no no.