Is 3-Hydroxyoestra-1,3,5(10),7-tetraen-17-one vegan?

Equilin is also known as 3-Hydroxyoestra-1,3,5(10),7-tetraen-17-one.

Equilin is a natural estrogenic steroid hormone found in the urine of pregnant mares, and is one of the components of conjugated equine estrogens used in hormone replacement therapy.

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