Hi dear swati i read ur problem of premature greying of hairs.In ayurveda this occurs due to increase of pitta and kaff doshas. U mainly tell the problem of greying of hair bt not tell others symptoms of the disease like
constipation ,chronic
cold ,digestion of food.so i does not tell ur treatment for greying of hairs properly.but in my suggestion following precaution is taken.
1-USE 10-12GLASS OF WATER IN OUR ROUTINE LIFE.
2-EAT GREEN VEGETABLE ,SALLAD ,AMLA CHURNA ONE TEASPOON WITH LAOHH BHASM DAILY.
3-IF U SUFFERING FROM RECURRENT
NASAL INFECTION THAN U FIRST CONCERN TO AYURVDIC DR FOR CURING IT.
4-USE BHAIGRAJ TEIL FOR UR HAIRS TO MAKE HEALTHY.
5-AVOID SPICY AND PITTA WARDAK DIET LIKE DAHI,CHAUMIN, BURGER ETC.
6-TAKE ALSO THE CALCIUM RICH DIET FOR UR HEALTY HAIRS.
7-BADAM ROGAN TEIL NASYA BY 2 DROPS OF THIS TEIL IN BOTH THE
NOSTRIL.
8-EAT THE ONE AMLLA EVERYDAY.
SO u met ur nearest ayurvedic physian to find the cause according to symptom.but you take this treatment and precaustion makes ur hairs blackish again.
Thanks for query.