Is Oyster Sauce Vegan?

Result: Not Vegan · High confidence

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Traditional oyster sauce contains oyster extract.

Traditional oyster sauce contains oyster extract. Classified Not Vegan because traditional oyster sauce contains oyster extract. Vegetarian mushroom-based versions need separate checking. The source is a vegan/vegetarian ingredient reference and is useful for source-risk screening, but product-level approval still needs review. Keep as needs_review until a human reviewer confirms the source, aliases, and any supplier-specific caveats.