White hair on mustache

Patient: I had white hair problem in mustache..,my age is 32.i am afraid about it spreading all hair turned in to white,please help me to slow down it atleast at the age of 40.any permanent solution is there means please tell me sir.i had a girl friend.how she will react i am afraiding.i am waiting for the answer sir.

Symptoms: white hair on mustache,beard

Doctor: