I have never heard of this, and I doubt very much that it would..it would probably make the cocoa butter more expensive, and the best thing about it is that it does a good job, and doesn't cost too much...
I'm a retired makeup artist & have said for years that people pay way too much for basic skincare!! it does not need to cost that much.
If you really like keratin that much, you could buy it and blend the two ingredients together in a 3rd jar or container.......just a thought!!
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Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them