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During the processes of developing the 2nd generation hair building fibers, we have considered the safety and environmental protection. Keratin is Biological Protein, it is also called Animal Protein.
It mainly processed by feather of birds, poultries and other animals (e.g. wool, cow, etc.) which contains bacteria.
Therefore, Keratin products generally need to add abundant of bactericides and preservatives to kill the bacteria.
This is adverse to the safety of users as well as the environment.