Aaaaargh
Question: People’s hair is sometimes reported to have turned white overnight
as a result of shock. Can white hair be the result of shock and, if this is so,
how long might it take? What is the process involved?
Answer: White hair results from the loss of melanocytes when we age.
Melanocytes produce the pigment melanin, which gives hair and skin their colour.
Hair that is already grown is fairly immutable and only new growth can bring
about a change in colour. Hair strands have a life span of up to seven years so
a complete shift to white…
