CheckVegan

Is Silkworm Frass vegetarian?

Silkworm Frass

Vegetarian Vegetarian

Silkworm Frass is the excrement (frass) collected from the silkworm, Bombyx mori, sometimes used in cosmetic or agricultural applications. It is an insect-derived byproduct but does not require killing the insect to obtain it.

INCI name Silkworm Frass
CosIng ID 90329
Last reviewed 4 July 2026

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.

Report an issue