Hi
Your complaint of greying of hair, prematurely, taking your age into considering, is having many causes.
Including hereditary & deficiency of some nutritional elements.
To start check your haemoglobin level &
thyroid test.
Start eating good, balanced & nutritious food.
Do regular exercise.
If there is any abnormality in the blood tesr, you can take appropriate treatment.
You can consult a doctor, who can advise you. Homoeopathy is good in treating these kinds of problems.
Gud luck