I'm taking a break from protein because my fin hair may not be able to take it. I plan on incorporating it into my routine say once a month or once every 2 months instead of weekly (like I was doing).
I think it also depends on the type of protein you use, too. Supergirl posted a wonderful thread about this.
My hair likes the lighter proteins like milk, wheat, silk, etc. And I only need to use those sparingly.