Is GDL vegan?

Glucono Delta-Lactone is also known as GDL.

Glucono delta-lactone (GDL) is a fine white acidic powder that is the cyclic ester of gluconic acid. It is commercially produced by the microbial oxidation of glucose, typically using Aspergillus niger, and is used as a mild acidulant, leavening agent, and coagulant in food and cosmetics.

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