Pigment-producing cells add colour to our hair as it grows. As we age the pigment-producing cells slowly die off and individual hairs appear white. When mixed in with strands of hair that still have their original colour, hair looks grey.
We can go grey whatever colour hair we have, however grey hairs tend to be much more noticeable in darker hair as darker hair has more pigment than lighter hair.
Most people begin to notice that they have grey hair by the time they turn 40, although grey hairs can appear when people are in the teens or twenties.
A study in 1996 showed that smokers are more likely to go grey prematurely than non-smokers. Werner syndrome (a rare disorder where sufferers age prematurely) and pernicious anaemia (a type of autoimmune anaemia) can also cause premature greying.
Unless we dye it, it comes to the best of us ~ grey hair, that is. Older people tend to develop the grey hair because the pigment that makes up the colour of our hair is lost and the hair becomes colourless. Grey hair is considered to be a normal part of the ageing process. The age at which is happens caries from person to person. Some people as young as 18 have been known to go grey or white. In general, nearly everyone over the age of 75 has grey hair and in general men tend to go grey before women.
Grey hair however isn't actually grey at all. The grey head of hair is a result of the contrast between the dark and white or colourless hair forming an overall grey appearance. People who start out with very pale blonde hair usually develop white hair instead of grey. Red heads tends to become a sandy colour, rather than grey or white.
I am 45 years old and have no grey hairs! Is that unusual?
There are a number of different reasons as to why hair turns grey or white. The most common, workaday causes of grey hair are relatively few but these are the most definite ones. For instance, hair starts changing colour to grey or whiten due to a severe bout of illness or even shock, both cases, which shake up a person mentally and physically. On other instances, lack of proper diet is a major reason for hair whitening. What happens is, once the nutrients that the body is receiving are not adequate for the body results in the person suffering from malnutrition and ultimately results in the whitening or greying of hair.
Another very important yet indirect factor that causes this state is of a hereditary nature. Many people, while still in their teens or early twenties, tend to get white or grey hair. It is quite embarrassing al right but the purpose is anything but mortifying. The reason could be conveniently attributed to the genetic aspect of the problem.
Besides these causes, which are although strong but no so concentrated, the most frequent reason for hair whitening is the factor of ageing. Once one enters the phases of middle age, hair starts turning grey. This is because the matrix or middle layer of the hair root 'bulb' stops to produce the colour granules, which give the hair its colour.
Worry lonely sad on diet thinking too much by gine the age you don't have inaf sllip
To be worry or unhappy lonlyor your body loose some vitamins or to be angry or you don't have inaf sleep or you don't have inaf water and if you think about white hair al the time you get plenty after and if you change your hair color