Is Undressed vegan? Erica Halliwell February 18, 2020 18:24 Updated Follow No, Undressed is not vegan. Undressed has hydrolyzed silk in it which comes from the cocoon of a silk worm. Related articles What is Undressed? Is Dressed Up vegan? Are Hairstory products tested on animals? Does Undressed contain nuts, soy, wheat or gluten? Who is Powder best for? Comments 0 comments Please sign in to leave a comment.