It is my opinion that stress does not cause gray hair, although certainly some doctors have postulated that it does. This really has not been proven, and stress has been stated to be the cause of so many other ailments and maladies that the argument lacks credence.

Other than genetics (and age, which is intrinsically linked), hair treatment is usually the only cause of gray hair. Hair dyes of course, can make hair gray (whether intentionally or not -- I think most gray hair dye products probably target actresses).

Gray hair is caused by melanocytes dying due to age or functioning improperly, and no longer being able to synthesize melatonin to color the hair. Some hair treatments may also affect melanocytes, including bleach and other chemicals, although there is not much evidence to this -- certainly, the hair treatment industry does not lend much funding to studies that could potentially support this theory.
Source(s):
http://www.seasonsindia.com/beauty/greyhair_sea.htm


Permalink | Report