5. You have unchecked thyroid

a major symptom of thyroid is depression which causes stress and result in slow production of melanin and insufficient production of melanin can cause gray hair. To avoid this problem seek doctors advice and instantly be on your regular medication.

6. You love to use gels and sprays on your hair

People, especially teenagers normally use gels and for smoothening of their hair and for various hair styles but those hair sprays and gels contain several chemicals that can damage your hair follicles and decrease the production of melanin and increase in amount of gray hair.

7. You forget to oil your hair

Oiling your hair is the best way to avoid gray hair as oiling provides sufficient nourishment to the hair follicles, which increases the strength and growth of hair. Oiling keeps your hair hydrated which cannot be compensated with the help of shampoo and conditioner.

8. A Medical condition

Autoimmune diseases effectually attack cells within the body, and this includes hair follicles, which makes it possible for premature greying to occur. There are other medical causes, as well.

According to WebMD: “a vitamin B-12 deficiency or problems with your pituitary or thyroid gland can cause premature aging.” The good news is – if the condition is treated –  that the physical effects of premature aging (including greying of hair) can be reversed. This said, premature greying of the hair due to medical reasons is thought to be rare.