Is Estrone vegetarian?

Estrone (E1) is a naturally occurring steroidal estrogen and minor female sex hormone synthesised from cholesterol in the gonads and adrenal glands of mammals. It is found in the urine and ovarian tissue of various animals and has historically been extracted from the urine of pregnant mares. As an animal-derived hormone, it is neither vegan nor vegetarian.

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

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.