Is Amidinocysteine vegetarian?

Amidinocysteine, also known as 2-guanidino-3-mercaptopropionic acid, is a cysteine derivative used in cosmetic hair treatment formulations. As it is derived from cysteine, which can be sourced from animal, plant, or synthetic origins, its vegan status is unconfirmed.

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.