Thank you for your question. It is difficult to say why your hair is breaking. Customers who use Ecocolors do comment on how conditioned their hair feels after coloring. It is important for you to consider the following concerning hair breakage: Are you getting enough protein and omega three fatty acids(fish oil or flax oil) in your diet? Are you on hormones/ Hormonal imbalances may affect the hair. When applying your color once a month, it is important to apply full strength color to the new growth only.If you want to repigmentize your previously colored hair, it is important to dilute your color mixture by half with water to apply to your previously colored ends.