Explanation One

• Natural hair loss in a man, or male pattern baldness, as it is normally called is basically due to male hormones, (collectively known as Androgens).
  
  
• The most relevant of these hormones with regards to hair loss is called testosterone.
  
  
• In the case of a man who has inherited the necessary genes for hair loss, a little of this testosterone is formed by some of the hair roots into a derivative called Dihydrotestosterone.
  
  
• It is Dihydrotestosterone that is actually responsible for hair loss.
  
  
• When anyone washes their hair there are always a few hairs left in the basin afterwards.
  
  
• This does not necessarily mean that the person is thinning.
  
  
• All that is happening is that some of the hair roots are shedding their old hairs and, in time, these will be replaced.
  
  
• The new hairs are as strong as the previous hairs were.
  
  
• The small white bobble on the end of the hair is not the hair root, it is in fact, formed from degenerated cells from within the hair root and is called the club.
  
  
• If it were possible for a hair to be pulled from the scalp bringing a hair root with it then the scalp would actually bleed.
  
  
• If dihydrotestosterone has been produced it will be present in the surface sebum (grease) which is secreted by everyone from the sebum glands present through their skin tissue.
  
  
• Under these circumstances, when a hair is shed the dihydrotestosterone will enter the follicle (the hole in the scalp from which the hair has come) and inside there it reacts chemically.
  
  
• What it actually does is to miniaturise the hair root and follicle.
  
  
• This means that the new hair growing through will be finer.
  
  
• When this new fine hair is later shed the Dihydrotestosterone again miniaturises the follicle and hair root even further and hence the next hair will be finer still.
  
  
• This process will continue until the hair is so fine that it may as well not be there at all and if this happens over an area, then the man will obviously thin over that area and hence baldness occurs.
  
  
• You can usually tell when a person is thinning on the front hair line by feeling the thickness of the hair and comparing it with the hair at the back of the head.
  
  
• It takes a bit of skill but eventually you should be able to tell just by touch when the hair is starting to thin.