That's a very good question because many of us are afraid because of that very reason. I did experience some breakage, but not alot. What I think helped me was I started using a pick or what's call a "finishing comb" when you have two different textures. You can go to growafrohairlong.com and see Robin's picture of the comb. It would be unrealistic to think you can do a 1 year stretch and not experience some breakage. I kept my eyes open for key areas like the nape of neck, behind ears, and the front middle. I combed my hair very gently, and I can honestly say that I hardly see no breakage. I do see some, but not for me to be alarmed about. In fact I remember Wanakee in just talking about taking care of afro texture hair said in one of her booklets that we should expect to get some breakage, but we want to control the breakage so that it does not get out of control. Stretching for 1 year requires effort because it is not easy; but I armed myself with the right tools and great products and patience and I got there. I'm surprise myself that I did it!