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Thanks a lot for your answers. At the end of the day, its seems that -from a cost-benefit point of view- it is not worth adding the collagen. Regards

I have been asked if I could add collagen into the actual CP soap; but have not been able to find literature on the subject either on books or on the Internet.

Hi everyone. Does anyone know if its possible/good idea to add collagen to CP soaps? Will the collagen and its properties survive saponification? Thanks in advance for your answers!