What is the significance of those short hairs near the scalp? To explain this, we are going to study the lifecycle of a hair. A distinction is made between three phases, through which growth of a hair can be viewed, from the beginning to the end of its lifecycle. There is a growth, rest and transition phase of a hair cycle. After reading this site, you will understand why Aminexil works against hair loss. Growth phase A hair will generally last five to six years. Under normal circumstances, during this period a hair can grow freely. You can see the arrector pili muscle, nerves and sebaceous glands. It is nice to know that the shape of the hair root determines whether you have straight, wavy [&hellip