The answer lies in a chemical called melanin. The root of every hair strand under the scalp is surrounded by a tube off hair tissue called hair follicle which contains pigment cells. These pigment cells produce the chemical called melanin that gives the hair stand its colour – black, brown, blonde, red et al.
When a person grows older, these pigment cells begin to die and the melanin production reduces too, making the strand less colourful and more transparent – grey, silver or white. And that is why hair greying is associated with age.
Even though genetics and hereditary factors play a major role in determining the time of your hair turning grey, statistics show that the average age for Caucasians to go grey is mid 30’s, Asians is late 30’s and African- Americans is mid 40’s.
But there has been a drastic change in these figures with the growing number of younger people in their 20’s and younger reporting grey hair. This premature greying of hair has been related to several factors.
Causes:
A number of medical conditions as well as lifestyle choices have been related to premature greying of hair.
Medical Conditions:
Thyroid Disease: An underactive or overactive thyroid can affect the melanin production in the hair which can cause premature greying.
B12 Deficiency: Deficiency of B12 has also been linked to premature greying of hair.
