Last reviewed May 2026 · 1 min read

Is Glycine vegan?

Also known as: E640

E-number: E640

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Source can be plant or animal.

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In short

It depends — Can be synthetic (vegan) or extracted from animal gelatin.

01 · The basics

What is Glycine?

An amino acid used as a sweet-tasting flavor enhancer.

02 · The source

Where it comes from

Can be synthetic (vegan) or extracted from animal gelatin. Verification needed.

03 · Alternatives

Best vegan alternatives

Synthetic glycine

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Frequently asked

FAQ

Is E640 vegan?

Verification needed.

Commonly found in

BreadDrinks

Other flavor enhancer ingredients

Yeast Extract

Vegan

A thick liquid or powder made from the contents of yeast cells, used as a flavor enhancer.

Glutamic Acid

Vegan

An amino acid used as a flavor enhancer to provide an umami taste.

Monopotassium Glutamate

Vegan

The potassium salt of glutamic acid, used as a lower-sodium alternative to MSG.

View all flavor enhancer ingredients →

Keep exploring

Related ingredients

E422 (Glycerol / Glycerin)

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A sweet, syrupy liquid used as a humectant in foods and cosmetics.

E920 (L-Cysteine)

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A dough conditioner used in commercial bread baking.

Calcium Carbonate

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A common mineral used as a white food coloring, an anti-caking agent, and a calcium supplement.

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