Is L-Cystine N,N'-bis(3-carboxy-1-oxopropyl) tetrasodium salt vegan?

Tetrasodium Disuccinoyl Cystine is also known as L-Cystine N,N'-bis(3-carboxy-1-oxopropyl) tetrasodium salt.

Tetrasodium Disuccinoyl Cystine is the tetrasodium salt of a cystine derivative modified with succinic acid groups, used in cosmetics for its conditioning and antioxidant properties. Cystine can be derived from animal, plant, or synthetic sources.

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