Is Cysteine Vegan?

An amino acid found in the hair protein keratin.

Not necessarily banned. Consider the source of each ingredient.

May be Vegan

Foods with ingredients that contain cysteine
Whey Protine
Whey Protine

Not Vegan

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Flagged Ingredients (View All)
  • Alanine - The building blocks of protein in all animals and plants.
  • Amino - The building blocks of protein in all animals and plants.
  • Glutamic - An amino acid found widely in plant and animal tissue.
  • Cysteine - An amino acid found in the hair protein keratin.
  • Milk - Not vegan if derived from an animal. Check the ingredients.
  • Tyrosine - Amino acid often of plant or synthetic origin but sometimes hydrolyzed from casein (milk).
  • Glycine - Flavor Enhancer - Can sometimes be prepared from gelatine, but can be made synthetically.
  • Chocolate - Most chocolates are not vegan. Check the ingredients for dairy or milk.
  • Eggs - This product contains egg in one form or another. Not vegan friendly.
  • Methionine - Essential amino acid found in various proteins (usually from egg albumen and casein).
  • Whey - The watery part of milk that remains after the formation of curds.

Possibly Vegetarian

Non-English: Grade may be inaccurate.

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Flagged Ingredients (View All)
  • Amino - The building blocks of protein in all animals and plants.
  • Glutamic - An amino acid found widely in plant and animal tissue.
  • Cysteine - An amino acid found in the hair protein keratin.

Possibly Gluten Free

Non-English: Grade may be inaccurate.

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Flagged Ingredients (View All)
  • Egg - May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs.
  • Chocolate - Some varieties have a risk of contamination from other products. Read the label to see if gluten free.
  • Eggs - May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs.
Iso Whey Zero Hazelnut
Iso Whey Zero Hazelnut

Not Vegan

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Flagged Ingredients (View All)
  • Alanine - The building blocks of protein in all animals and plants.
  • Methionine - Essential amino acid found in various proteins (usually from egg albumen and casein).
  • Eggs - This product contains egg in one form or another. Not vegan friendly.
  • Glycine - Flavor Enhancer - Can sometimes be prepared from gelatine, but can be made synthetically.
  • Cysteine - An amino acid found in the hair protein keratin.

Possibly Vegetarian

Non-English: Grade may be inaccurate.

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Flagged Ingredients (View All)
  • Cysteine - An amino acid found in the hair protein keratin.

Possibly Gluten Free

Non-English: Grade may be inaccurate.

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Flagged Ingredients (View All)
  • Eggs - May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs.
Tartes Flambes Kauffer's Alsaciennes
Tartes Flambes Kauffer's Alsaciennes

Not Vegan

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  • Milk - Not vegan if derived from an animal. Check the ingredients.
  • Dextrose - Sometimes derived from animal tissues and fluids. Check the label to determine if plant based.
  • E471 - Mono and di-glycerides of fatty acids (sometimes derived from animal fats).
  • Cysteine - An amino acid found in the hair protein keratin.

Possibly Vegetarian

Non-English: Grade may be inaccurate.

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Flagged Ingredients (View All)
  • Cysteine - An amino acid found in the hair protein keratin.
  • Dextrose - Sometimes derived from animal tissues and fluids. Check the label to determine if suitable.
  • E471 - Mono and di-glycerides of fatty acids (sometimes derived from animal fats).

Not Gluten Free

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Flagged Ingredients (View All)
  • Gluten - Gluten is a general name for the proteins found in different forms of wheat.
4 Bun's Poulet Fromage Frais
4 Bun's Poulet Fromage Frais

Not Vegan

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Flagged Ingredients (View All)
  • Milk - Not vegan if derived from an animal. Check the ingredients.
  • Lactose - Milk sugar. A type of sugar only found in animal milk.
  • Eggs - This product contains egg in one form or another. Not vegan friendly.
  • Dextrose - Sometimes derived from animal tissues and fluids. Check the label to determine if plant based.
  • Glucose - Sometimes derived from animal tissues and fluids. Check the label to determine if plant based.
  • Cysteine - An amino acid found in the hair protein keratin.

Possibly Vegetarian

Non-English: Grade may be inaccurate.

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Flagged Ingredients (View All)
  • Cysteine - An amino acid found in the hair protein keratin.
  • Dextrose - Sometimes derived from animal tissues and fluids. Check the label to determine if suitable.

Not Gluten Free

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Flagged Ingredients (View All)
  • Malt - Many malted products contains gluten. Check the ingredients if gluten-free is not on the label.
  • Gluten - Gluten is a general name for the proteins found in different forms of wheat.
  • Eggs - May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs.
Tartes Fines Pommes De Terre, Effiloch De Canrd  La Figue Et Compote D'oignons
Tartes Fines Pommes De Terre, Effiloch De Canrd La Figue Et Compote D'oignons

Not Vegan

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Flagged Ingredients (View All)
  • Cysteine - An amino acid found in the hair protein keratin.
  • Milk - Not vegan if derived from an animal. Check the ingredients.

Possibly Vegetarian

Non-English: Grade may be inaccurate.

Create an account to set your diet and customize ingredients you want to avoid.

Flagged Ingredients (View All)
  • Cysteine - An amino acid found in the hair protein keratin.

Not Gluten Free

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Flagged Ingredients (View All)
  • Gluten - Gluten is a general name for the proteins found in different forms of wheat.

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