This estimate was based on analyzing a variety of different plant-based meat products and checking whether they used fermentation or not.

Instance	Met	Details
Beyond Burger	No	Fermentation is not typically mentioned as part of the Beyond Burger production process, which focuses on plant-based ingredients like pea protein and beet juice.
Impossible Burger	Yes	Fermentation is used to produce heme, a key ingredient in the Impossible Burger that mimics the taste of meat.
Upton's Naturals Jackfruit	No	Upton's Naturals Jackfruit is typically a minimally processed product and does not involve fermentation in its production.
Ocean Hugger Foods Ahimi	No	Ocean Hugger Foods Ahimi is a vegetarian alternative to tuna made from tomatoes. It uses a process involving soy sauce, water, and other ingredients, not fermentation.
Good Catch Plant-Based Tuna	No	Good Catch Plant-Based Tuna is a plant-based tuna alternative, and fermentation is not typically associated with its production process.
MorningStar Farms Veggie Dogs	No	MorningStar Farms Veggie Dogs are made with a blend of vegetables, soy protein, and spices. They are not fermented.
Lightlife Smart Dogs	No	Lightlife Smart Dogs are made with a blend of soy protein, wheat gluten, and other ingredients. They are not fermented.
Quorn Meatless Pieces	Yes	Quorn Meatless Pieces are made from mycoprotein, which is derived from fungi. Fermentation is a key process in producing mycoprotein.
Amy's California Veggie Burger	No	Amy's California Veggie Burger is made with organic vegetables, spices, and grains like oats or oat bran. It is certified vegan and does not contain artificial or industrial ingredients.
Dr. Praeger's Chick'n Tenders	No	Dr. Praeger's Chick'n Tenders are made with a blend of vegetables, pea protein, and spices. They are not fermented.
MorningStar Farms Veggie Pulled Pork	No	MorningStar Farms Veggie Pulled Pork is made with soy protein, vegetables, and spices. It is not fermented.
Trader Joe's Protein Patties	No	Trader Joe's Protein Patties are made from a blend of pea protein, sunflower oil, beets, and seasonings. They are not fermented.
Quorn Meatless Pieces	Yes	Fermentation is a key process in producing mycoprotein, the main ingredient in Quorn Meatless Pieces.
Tofurky Deli Slices	No	Tofurky Deli Slices are made from plant-based ingredients, typically using wheat gluten and tofu, and do not generally involve fermentation in their production process.
Yves Veggie Ground Round	No	Yves Veggie Ground Round is made with a blend of soy protein, wheat gluten, and vegetables. It is not fermented.
Beyond Meat Beyond Sausage	Yes	The production process for Beyond Meat's Beyond Sausage does not involve fermentation or fermented ingredients. The process primarily uses plant-based proteins, such as pea and rice proteins.
Tofurky Plant-Based Ham Style Roast	No	The production of Tofurky Plant-Based Ham Style Roast does not involve fermented ingredients.
Yves Veggie Cuisine Meatless Deli Turkey	No	Tofurky Slow Roasted Chick'n is made with a blend of wheat gluten, soy protein, and other ingredients. It is not fermented.
Impossible Sausage	Yes	The Impossible Sausage involves fermentation, specifically in the creation of one of its key ingredients, heme.
Tofurky Italian Sausage	No	Tofurky Italian Sausage is made with a blend of textured vegetable protein, water, soy protein concentrate, and other ingredients. It is not fermented.
Yves Veggie Breakfast Links	No	Yves Veggie Breakfast Links are made with water, soy protein, wheat gluten, and other plant-based ingredients, but there is no indication that fermentation is used in their production.
The Very Good Butchers Very Good Steak	No	The Very Good Butchers produce plant-based meat alternatives made from whole food ingredients. Fermentation is not part of the production method for this product.
Lightlife Plant-Based Ground	No	Lightlife Plant-Based Ground is made from a blend of soy protein, wheat gluten, and other ingredients. It is not fermented.
Gardein Beefless Ground	No	Gardein Beefless Ground is made with a blend of soy protein, wheat gluten, and other ingredients. It is not fermented.
Sweet Earth Traditional Seitan	No	Seitan is typically made by washing wheat flour dough with water to remove the starch granules, leaving behind the gluten. Fermentation is not a standard part of this process.
Upton's Naturals Seitan Bacon	No	Fermentation is not typically used in the production of seitan, which is made from wheat gluten.
Lightlife Smart Bacon	No	Lightlife Smart Bacon primarily uses ingredients like water, soy protein isolate, and wheat gluten. It is not fermented.
Trader Joe's Soy Chorizo	No	Trader Joe's Soy Chorizo is made primarily with soy protein, vegetable oil, and spices. It is not fermented.