Is Estra-1,3,5(10)-triene-3,16,17-triol, (16alpha,17beta)- vegan?

Estriol is also known as Estra-1,3,5(10)-triene-3,16,17-triol, (16alpha,17beta)-.

Estriol is a naturally occurring steroid estrogen hormone used in menopausal hormone therapy, produced either through chemical synthesis or extraction/semi-synthesis involving biological sources such as pregnant animal urine or plant sterols. Due to variable production pathways, its origin is unconfirmed.

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