In Asian population greying of hair or premature canities is considered before age 25..
There are various causes of premature canities apart from genetic others like certain drugs .. nutritional deficiencies...with certain syndrome..and stress.
Next Steps
I would suggest you to do destressing exercise and adequate diet with proper nutritional supplements including micronutrients.
rest you can always consult online for better drugs .
Answered2020-03-17 07:29:33
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