Is Hydrolyzed Leather Protein Isostearoyl Ester vegan?

Isostearoyl Hydrolyzed Collagen is also known as Hydrolyzed Leather Protein Isostearoyl Ester.

Isostearoyl Hydrolyzed Collagen is a derivative of hydrolyzed animal collagen (often from leather/hide processing byproducts) esterified with isostearic acid, used in cosmetics as a skin and hair conditioning agent.

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