Sir I am male and 24 year old, I do have some grey(white )hair since 1 year ago. And i want to know do grey hair start grey from root or tip of hair. I have this query because there is partial grey and black color in my some hair. I donot have any medical check and examination regard to this. Does it can be cure if there is no any cause of being grey due to heredity reason rather than other cause. Looking for complete response on my query.Thank you.