hi. I have been white blonde for several years now and my hair is still pretty healthy and in fact, continues to grow. Most bleached hair suffers from a lot of breakage but I am growing mine long. It is already armpit length. I now have someone help me bleach my hair (my roots) every 3 weeks at home. The salon started and did the initial bleaching and for about 2 yrs. I have done it on my own ever since because I can do as good a job and was always bringing my own products in and telling her what not to do. Now I just have them trim my hair. They can't believe how healthy my bleached hair is. But it is actually because I don't do all the stuff they say and I avoid their products.
First of all, I have always used sulfate free and silicone free products. This last year I have been only conditioner washing (vo5 conditioners). Except when rinsing the bleach out. I use a sulfate free shampoo (trader joes). Every 2 wks and before each root bleaching I do a protein treatment(sally gvp kpak) followed by a deep conditioning balm mask(sallys gvp matrix balm). I use a heat cap and then usually sleep in it. I also do oil masks. I always apply organic virgin coconut oil an hour or two before my root touch-up. Coconut oil and avocado oils are the only oils that can actually absorb into the hair. I don't heat style too much but when I do, I use a leave in spray that has an evaporating silicone, clyclomethicone (sallys miracle 7). All other silicones, will protect from heat, but will coat the hair and prevent all the conditioning from being able to absorb and then to remove the silicone a clarifying shampoo must be used and that just leads to drying the hair out. So it is just a vicious cycle that should be avoided. For me, if my hair is strong and hydrated heat doesn't affect it. If I need to tone, I use shimmerlights purple conditioner. I also wash it in a ph restoring foaming solution which neutralizes residual bleach and closes the cuticle. hope this helps you with some ideas.