CheckVegan

Is Ethinylestradiol vegetarian?

Ethinylestradiol

Ethinylestradiol is a synthetic estrogen widely used in combined oral contraceptive pills, typically produced semi-synthetically from plant or animal steroid precursors.

Also known as (17α)-19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 17α-Ethynylestradiol, Ethinyl Estradiol
INCI name Ethinylestradiol
CAS number 57-63-6
EC number 200-342-2
CosIng ID 85094
Last reviewed 4 July 2026

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

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