Important things to keep in mind:
Beyond Burgers: "Peas are legumes. People with severe allergies to legumes like peanuts should be cautious when introducing pea protein into their diet because of the possibility of a pea allergy. Our products do not contain peanuts or tree nuts."
Impossible Burgers: "The Impossible Burger contains soy. It also contains coconut oil (The FDA classifies coconut as a tree nut for food labelling purposes, but refined coconut oil is not considered an allergen). Our product does not contain dairy, eggs, fish, peanuts, shellfish, or wheat, and it’s safe for those with alpha-gal syndrome. The Impossible Burger also contains potato protein. If you have an allergy to either raw or cooked potatoes, you should not consume the Impossible Burger."