Hydrolyzed keratin is just the chopped up protein. It doesn’t really do anything for hair, especially in a rinse off product.
Cocodimonium hydroxypropyl hydrolyzed keratin is the same chopped up protein but it’s chemically modified so it sticks to hair. That means it will have some conditioning properties. (It’s not as good as other conditioning agents but it’s better than the keratin alone.)
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