My shampoo has silk protein, my conditioner has milk protein. My hair loves it, eats it up. And I don't think my hair was all that damaged. I've never colored and rarely use heat, except a little bit with the diffuser.
Now what's the difference in effect between the smaller and larger proteins, again?
Changed because the "number in place of a word" thing was bugging my no-longer-14-year-old self.