Top 100 Incompatible Ingredients for Vegetarian Diets

The top 100 most common ingredients that aren't compatible with each diet. Visit the Ingredient Guide for the full list for each diet.

Rank Ingredient Compatibility Description
1 Natural Sometimes Vegetarian Ingredients are not synthetic or artificial, but extracted directly from plants or animal products
2 Citric Sometimes Vegetarian Emulsifier - May contain animal fat as it is derived from Glycerin/Glycerol.
3 Dextrose Sometimes Vegetarian Sometimes derived from animal tissues and fluids. Check the label to determine if suitable.
4 Calcium Sometimes Vegetarian May be animal based. Double check the label to be sure of the origin.
5 Vitamin Sometimes Vegetarian Likely animal based but may be plant based. Check the label to verify the source of the ingredient.
6 Disodium Sometimes Vegetarian Flavor Enhancer - Often made from animals.
7 Palmitate Sometimes Vegetarian A fatty acid most commonly derived from palm oil but may be derived from animals as well.
8 Fish Never Vegetarian Fish are not considered a vegetarian food.
9 Chicken Never Vegetarian Chicken is not a vegetarian option if meat or flesh from an animal.
10 Beef Never Vegetarian Not a vegetarian friendly option. Beef is taken from the body of a cow.
11 Pork Never Vegetarian Pork, or pig, is not considered a vegetarian option.
11 Gelatin Never Vegetarian Protein obtained by boiling animal skin, connective tissue or bones, usually from cows or pigs.
12 E471 Sometimes Vegetarian Mono and di-glycerides of fatty acids (sometimes derived from animal fats).
13 Polysorbate Sometimes Vegetarian Derivatives of fatty acids, which are commonly sourced from animals. In cosmetics, foods.
14 Meat Never Vegetarian Meat is not a vegetarian option as it is derived from an animal.
15 Propylene Sometimes Vegetarian Emulsifier - May contain animal fats.
16 Glycerin Sometimes Vegetarian Often derived from animal fat but may also be plant based.
17 E120 Never Vegetarian Coloring - Cochineal (another name for carminic acid, a pigment made from powdered insects)
18 Turkey Never Vegetarian Not a vegetarian food if derived from the flesh, meat, or tissue of a turkey.
19 Molluscs Never Vegetarian Mollusca is the second largest phylum of invertebrate animals. Not a vegetarian option.
20 Bacon Never Vegetarian Bacon is a type of salt-cured pork/pig. Not considered a vegetarian option.
21 Shrimp Never Vegetarian Shrimp is not considered a vegetarian food.
22 Worcestershire Never Vegetarian Many varieties of Worcestershire sauce contain anchovies. Check the ingredients to be sure.
23 Cysteine Sometimes Vegetarian An amino acid found in the hair protein keratin.
24 Tuna Never Vegetarian Tuna is obtained from the tuna fish. Not a vegetarian food option.
25 Salmon Never Vegetarian Salmon is a kind of fish. Not considered a vegetarian food.
26 Polyglycerol Sometimes Vegetarian A byproduct of soap manufacture (normally uses animal fat).
27 Lard Never Vegetarian Fat from the abdomen of a pig that is rendered and clarified for use in cooking.
28 E422 Sometimes Vegetarian Sweetener - Likely plant-based but may be derived from animal fat.
29 Carbon Sometimes Vegetarian Coloring derived from animals unless otherwise described as plant based.
30 E631 Sometimes Vegetarian Disodium Inosinate: Can be produced from meat, fish or tapioca starch.
31 Carmine Never Vegetarian Red pigment extracted from the crushed carcasses of the cochineal insect, a cactus-feeding insect.
32 Sheep Never Vegetarian Sheep are not considered a vegetarian option.
33 Anchovy Never Vegetarian A small fish often used to give non-vegetarian food a salty flavor.
34 Animal Never Vegetarian This product contains an animal derivative. May not be vegetarian friendly.
35 Fur Sometimes Vegetarian The skin of an animal. Used in clothing.
36 Diglyceride Sometimes Vegetarian Emulsifier - May contain animal fats.
37 Crab Never Vegetarian Not a vegetarian option if sourced from a crab.
38 Marine Never Vegetarian Likely from fish or marine mammals (including porpoises).
39 Pollock Never Vegetarian Pollock is a fish. Not a vegetarian option.
40 Acetate Sometimes Vegetarian Possible sources are fish liver oil, egg yolks, butter, lemongrass, carrots or synthetics.
41 Collagen Sometimes Vegetarian Protein found in most tissues, including bone, cartilage and skin. Typically from cows or chickens.
42 Oleic Sometimes Vegetarian Fatty acid occurring in animal and vegetable fats.
43 Skin Never Vegetarian Animal based unless labeled as faux or artificial.
44 Cod Never Vegetarian Not a vegetarian option if from the cod fish.
45 Lobster Never Vegetarian Not considered a vegetarian option if sourced from the meat or tissue of a lobster.
46 Diacetyl Sometimes Vegetarian Emulsifier - May contain animal fat as it is derived from Glycerin/Glycerol.
47 Viande Never Vegetarian Meat - Flesh of an animal.
48 Tallow Never Vegetarian Solid fat of sheep and cattle separated from the membranous tissues. Typically found in margarine.
49 Anchovies Never Vegetarian A small fish often used to give non-vegetarian food a salty flavor.
50 Acetylated Never Vegetarian Can come from fish oil, egg yolks, butter, lemongrass, wheat germ oil, carotene in carrots, etc.
51 Monoglyceride Sometimes Vegetarian Often from animal fat but may be plant based. Check the label.
52 Retinol Sometimes Vegetarian Vitamin A obtained from vegetables, egg yolks, or fish liver oil.
53 Amino Sometimes Vegetarian The building blocks of protein in all animals and plants.
54 Cochineal Never Vegetarian Red pigment extracted from the crushed carcasses of the cochineal insect, a cactus-feeding insect.
55 Squid Never Vegetarian Squid is a sea animal and is not considered to be a vegetarian food.
56 Porc Never Vegetarian Pork - Pig meat.
57 Lamb Never Vegetarian Not vegetarian if meat or tissue sourced from a lamb/young sheep.
58 Duck Never Vegetarian Not a vegetarian option if sourced from a duck.
58 Bovine Never Vegetarian Another word for cows or cattle. Not a vegetarian friendly food source.
59 Blood Never Vegetarian From any slaughtered animal. Possibly in foods such as lecithin.
60 Xantham Sometimes Vegetarian A derivative of bacterial fermentation. Chicken lysozyme may be used in the manufacturing process.
61 Amylase Sometimes Vegetarian Enzyme derived from either animal (usually porcine pancreas), fungal, bacterial or plant source.
62 Seafood Never Vegetarian Seafood is any form of sea life regarded as food by humans. Likely animal based.
63 Bee Sometimes Vegetarian This product contains an ingredient derived from bees. May not be vegetarian friendly.
64 L-cysteine Sometimes Vegetarian Improving Agent - Produced commercially from animal and human hair (and feathers).