Vegan

E571 is classified as vegan by the local ingredient taxonomy.

Names you may see on a label

Stearát amonnýAmmoniumstearaattiAmmoniumstearaattiaStéarate d'ammoniumStearato di ammonioAmmoniumstearatEstearato de amonioAmmoniumstearaatEstearato de amónioСтеарат амоніюStearynian amonuСтеарат аммония스테아르산 암모늄

How to verify it

Check that the name refers to this exact ingredient and not a similar additive with a different source.