CheckVegan

Is Ethisterone vegetarian?

Ethisterone

Ethisterone (ethinyltestosterone) is a synthetic progestin medication historically derived via chemical synthesis from animal-derived steroid precursors, used in the treatment of gynecological disorders but now discontinued.

Also known as Anhydrohydroxyprogesterone, Ethinyltestosterone, Pregn-4-en-20-yn-3-one, 17-hydroxy-, (17-alpha)-, Pregneninolone
INCI name Ethisterone
CAS number 434-03-7
EC number 207-096-5
CosIng ID 81577
Last reviewed 10 July 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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