I am 29 years old , working in construction company. My beards started to grey( premature greying)from last one years and rate of greying of beards is very fast. First I thought it may be genetic so I talked to my father but he told me, He didn't get grey hair before 35 years age. So I visited some dermatologist and explained them about my problem and told it is not genetic, they given me some b-complex capsules and hair serum for treatment. I had done treatment by following dermatologist prescribed medicine but my problem of greying of beards didn't stop. What should I do weather should I do the
vitamin b12, D3 and
thyroid test to find the real reason of premature greying of beards?