Why is there more grey hair on one side of your head than another?

It is natural to have more grey hair on one side of your head than the other. This is due to a combination of genetics and environmental factors.

Genetics

The most significant factor that determines the distribution of grey hair is genetics. Some people are simply more likely to develop grey hair on one side of their head than the other. This is because the genes that control hair color are located on different chromosomes. If you inherit a gene for grey hair from one parent and a gene for dark hair from the other parent, you may end up with a mix of grey and dark hair on your head.

Environmental Factors

Environmental factors can also contribute to the development of grey hair. These factors include:

* Stress: Stress can cause the body to produce more cortisol, a hormone that can damage hair follicles and lead to grey hair.

* Smoking: Smoking can damage hair follicles and cause grey hair.

* Sun exposure: Sun exposure can damage hair follicles and lead to grey hair.

* Vitamin B12 deficiency: A deficiency in vitamin B12 can lead to grey hair.

If you are concerned about the amount of grey hair on your head, talk to your doctor. They can help you determine the cause of your grey hair and recommend ways to manage it.