The hair get
there color from the melanin pigment. Normal graying of hair occurs due
to aging in late thirties and varies according to the race and ethnicity. If the
hair starts graying before age of 25 years, it is called as premature graying
or canities or achromotrichia.
The exact cause of premature graying has not yet been identified, however the studies conducted so far have found many potential causes. These causes are;
- The genetics play an important role in premature graying. The genetic predisposition may lead to early destruction of melanocytes required to pigment hair. If your parents had their hair gray early, you might get too.
- Certain environmental factors like UV radiations, pollution may also cause damage to hair and cause premature graying in genetically susceptible individuals.
- Emotional stress
- Hypothyroidism
- Deficiency of many vital vitamins and minerals has been found in patients with canities. Some of them are iron, copper, Vitamin D3, Vitamin B12 and protein deficiency.
- Smoking and alcohol consumption have been found to be responsible.
- Administration of certain drugs and chronic illness can lead to premature graying.
The treatment for premature graying depends on identifying the cause if any and correcting it. Your dermatologist would help you identify it and would advice you treatment accordingly.
Repigmenting the hair is difficult however with treatment the progression can be slowed.