Ingredient · E920

L-cysteine

Source
Unknown
Not yet classified by editors
Allergen
No
Role in food
Manufacturers add L-cysteine primarily as a dough conditioner in baked goods. It helps to …

What is L-cysteine?

L-cysteine is an amino acid, which is a building block of proteins. It can be produced through fermentation, chemical synthesis, or by breaking down animal proteins like poultry feathers or human hair.

Is L-cysteine a major allergen?

Not a major allergen.

What is L-cysteine used for?

Manufacturers add L-cysteine primarily as a dough conditioner in baked goods.

Is L-cysteine safe?

The FDA considers L-cysteine to be generally recognized as safe (GRAS) when used as a dough conditioner.

Why it's used

Manufacturers add L-cysteine primarily as a dough conditioner in baked goods. It helps to relax dough, making it more elastic and easier to process, which can reduce mixing times and improve the texture of products like pizza crusts and breads.

Health notes

The FDA considers L-cysteine to be generally recognized as safe (GRAS) when used as a dough conditioner. JECFA has evaluated L-cysteine and determined that it is not appropriate to set a numerical acceptable daily intake (ADI not specified) when used as a flour treatment agent. EFSA has also evaluated L-cysteine and concluded it is safe for its approved uses. There are no notable health controversies regarding L-cysteine itself, though some consumers may have concerns about its source if derived from animal products.

Allergen info

Not a major allergen.

Foods that contain L-cysteine

Compare products →
Sort by: Sugar Protein Sodium Calories
Amazon links are paid links. As an Amazon Associate I earn from qualifying purchases. About these links
Mediterranean Style Flatbread Pizza, Mediterranean Style Mama Cozzi'S Mediterranean Style Flatbread Pizza, Mediterranean Style Pizza High in sodium — 23% DV per serving High in saturated fat — 23% DV per serving 189kcal 9.1Protein 6.8Fat 22.7Carbs
Check price on Amazon
Rising Crust Supreme Pizza, Rising Crust Mama Cozzi'S Rising Crust Supreme Pizza, Rising Crust Pizza High in sodium — 35% DV per serving High in saturated fat — 25% DV per serving 230kcal 9.5Protein 8.8Fat 28.4Carbs
Check price on Amazon
Three Meat Pizza Rising Crust, Three Meat Mama Cozzi'S Three Meat Pizza Rising Crust, Three Meat Pizza High in sodium — 36% DV per serving High in saturated fat — 25% DV per serving 243kcal 10Protein 8.6Fat 30Carbs
Check price on Amazon
Tuscan Inspired Chicken Flatbread Pizza, Tuscan Inspired Chicken Mama Cozzi'S Tuscan Inspired Chicken Flatbread Pizza, Tuscan Inspired Chicken Pizza High in saturated fat — 20% DV per serving 206kcal 9.6Protein 6.6Fat 27.9Carbs
Check price on Amazon
Large Flour Tortillas LIDL Large Flour Tortillas Mexican Dinner Mixes High in sodium — 20% DV per serving 268kcal 5.6Protein 6.3Fat 46.5Carbs
Check price on Amazon
White Vegetable Crispy Thin Crust Pizza With Mozzarella, Spinach, Ricotta, Romano Asiago, And Parmesan In A Creamy Garlic Sauce, White Vegetable LIDL White Vegetable Crispy Thin Crust Pizza With Mozzarella, Spinach, Ricotta, Romano Asiago, And Parmesan In A Creamy Garlic Sauce, White Vegetable Pizza High in sodium — 26% DV per serving High in saturated fat — 45% DV per serving 331kcal 9.2Protein 23.1Fat 19.2Carbs
Check price on Amazon
Four Cheese Self Rising Crust Pizza, Four Cheese LIDL Four Cheese Self Rising Crust Pizza, Four Cheese Pizza High in sodium — 28% DV per serving High in saturated fat — 25% DV per serving 232kcal 9.4Protein 8.0Fat 29.0Carbs
Check price on Amazon
BBQ Recipe Chicken Crispy Thin Crust Pizza, BBQ Recipe Chicken LIDL BBQ Recipe Chicken Crispy Thin Crust Pizza, BBQ Recipe Chicken Pizza High in sodium — 30% DV per serving High in saturated fat — 30% DV per serving 231kcal 10.5Protein 8.4Fat 29.4Carbs
Check price on Amazon
Pepperoni Self Rising Crust Pizza, Pepperoni LIDL Pepperoni Self Rising Crust Pizza, Pepperoni Pizza High in sodium — 30% DV per serving High in saturated fat — 25% DV per serving 237kcal 9.6Protein 8.9Fat 29.6Carbs
Check price on Amazon
Honey Wheat Pretzel Twists, Honey Wheat LIDL Honey Wheat Pretzel Twists, Honey Wheat Chips, Pretzels & Snacks 400kcal 6.7Protein 3.3Fat 83.3Carbs
Check price on Amazon
Three Meat Pepperoni, Sausage, Beef Topping Pepperoni Made With Pork, Chicken & Beef, Sausage Made With Pork & Chicken Cheese Stuffed Crust Pizza, Three Meat Mama Cozzi'S Three Meat Pepperoni, Sausage, Beef Topping Pepperoni Made With Pork, Chicken & Beef, Sausage Made With Pork & Chicken Cheese Stuffed Crust Pizza, Three Meat Pizza High in sodium — 38% DV per serving High in saturated fat — 35% DV per serving 244kcal 10.3Protein 10.3Fat 27.6Carbs
Check price on Amazon
Italian Style Classics Chicken Alfredo Pizza Kitchen, Italian Style Classics Mama Cozzi'S Italian Style Classics Chicken Alfredo Pizza Kitchen, Italian Style Classics Pizza High in sodium — 20% DV per serving High in saturated fat — 25% DV per serving 222kcal 12.7Protein 7.9Fat 23.8Carbs
Check price on Amazon
Medium Flour Tortillas Not A Branded Item Medium Flour Tortillas Mexican Dinner Mixes 289kcal 6.7Protein 6.7Fat 46.7Carbs
Check price on Amazon
Pepperoni Cheese Stuffed Crust Pizza, Pepperoni Mama Cozzi'S Pizza Kitchen Pepperoni Cheese Stuffed Crust Pizza, Pepperoni Pizza High in sodium — 34% DV per serving High in saturated fat — 30% DV per serving 240kcal 10.3Protein 9.6Fat 28.8Carbs
Check price on Amazon
Spinach, Mushroom & Garlic Tomato Sauce, Mozzarella Cheese, Spinach, Mushrooms And Garlic Thin Crust Pizza, Spinach, Mushroom & Garlic Mama Cozzi'S Pizza Kitchen Spinach, Mushroom & Garlic Tomato Sauce, Mozzarella Cheese, Spinach, Mushrooms And Garlic Thin Crust Pizza, Spinach, Mushroom & Garlic Pizza High in sodium — 23% DV per serving High in saturated fat — 22% DV per serving 195kcal 8.3Protein 7.5Fat 21.8Carbs
Check price on Amazon
Plain Bread Crumbs, Plain Food Club Plain Bread Crumbs, Plain Bread & Muffin Mixes 367kcal 13.3Protein 5Fat 73.3Carbs
Check price on Amazon
Italian Style Bread Crumbs, Italian Style Food Club Italian Style Bread Crumbs, Italian Style Bread & Muffin Mixes 367kcal 13.3Protein 5Fat 73.3Carbs
Check price on Amazon
Soft Taco Dinner Kit Taco Bell Soft Taco Dinner Kit Mexican Dinner Mixes High in sodium — 37% DV per serving 244kcal 6.1Protein 4.9Fat 42.7Carbs
Check price on Amazon
Sweet Maple Flavor Bacon Stuffed Waffle, Sweet Maple Pillsbury Sweet Maple Flavor Bacon Stuffed Waffle, Sweet Maple Frozen Pancakes, Waffles, French Toast & Crepes High in sodium — 30% DV per serving High in saturated fat — 40% DV per serving High in cholesterol — 30% DV per serving 336kcal 9.3Protein 19.6Fat 31.8Carbs
Check price on Amazon
Pepperoni Four Cheese Stefano Foods Pepperoni Four Cheese Other Deli High in sodium — 33% DV per serving High in saturated fat — 40% DV per serving 327kcal 13.3Protein 17.7Fat 25.7Carbs
Check price on Amazon
Salt (232350 products) Water (166669 products) Sugar (183532 products) Yeast (29506 products) Thiamine Mononitrate (68530 products) Riboflavin (69581 products) Folic Acid (69155 products) Enzymes (47429 products) Niacin (66705 products) Wheat Flour (59929 products)

Auto-generated content. This description was generated automatically and is pending editorial review. Inaccuracies are possible. Found a mistake? Contact us.

Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.