There are many reasons why people get that gray hair sooner than they should. 

The most common reasons are: 

Faulty diet and lack of vitamins: When you do not eat healthy, you tend to lack necessary vitamins and nutrition that your body needs for healthy hair.  More specifically, the lack of vitamin B, iron, copper and iodine is a large contributor to gray

Mental worries: Worrying tends to produce tension in the skin of the scalp, which interferes with the supply of vital nutrition that is needed for your hair.

Other causes of gray hair:

1. Washing hair with hot water
2. Drying with an electric dryer
3. Unclean scalp
4. Hair dyes
5. Heredity

Home remedies for Premature Gray Hair:

To get rid of that gray, try these home remedies for gray hair before applying more chemicals to your hair. 

Indian gooseberry:

1. This fruit enriches hair growth and hair pigmentation.  Cut into pieces and then dry out the fruit in the shade.  Boil in coconut oil until the solid matter becomes like charred dust.  The dark oil helps with premature graying. 
2. You can also soak the Indian gooseberry pieces that have been cut overnight.  The water they soak in is nourishing to the hair.  Use this water as the final rinse after washing your hair.
3. Make up a concoction of one teaspoon of Indian gooseberry juice mixed with a teaspoon of almond oil and a few drops of lime juice.  Massage into the scalp every night.

Amaranth:  This vegetable’s juice helps to retain the black color of hair, as well as helps to prevent premature graying.  Also helps the growth of hair and texture.

Curry leaves:  Use these leaves in the form of a spice or squeeze in buttermilk to provide vitality and strength to your hair’s roots.  New hair roots will also grow healthier and retain a normal pigment.  Also, the leaves can be boiled in coconut oil for stimulating hair growth and bring back pigmentation.

These are just a few of the many natural remedies for gray hair!