Final answer:
Vanillin is made from eugenol and guaiacol, two cheaper sources that are part of its production process.
Explanation:
Vanillin can be made commercially from eugenol, a component found in essential oils, and one of the cheaper sources used in its production. Another source is guaiacol, which is a compound commonly associated with wood smoke flavor and contributes to the production of vanillin.
Learn more about Vanillin sources here:
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