Why do some people have curly hair?

 If you watch carefully around your surroundings, then you will get people of having different kinds of hair. Talking about the color, someone's hair is gray, someone’s black and some have brown hair. As far as hair design is concerned, some have very straight hair and some curly, while some have a mix, that is, slight curly. Why do some people have straight hair and some have curly hair? Today we will try to find out the answer.

Hair is made up of a protein called keratin, which also contains the cysteine amino acid. The sulphur of this cysteine forms a Sulphur-Sulphur bond with the sulphur of another cysteine, in this way the shape of the hair becomes tertiary structure due to the formation of many sulphur bonds in the hair and the hair becomes curly. If this bond is not formed or if it is formed in very small amounts, then the hair remains straight.

People change the shape of their hair, in which they make straight hair curly and curly hair straight. In this process of hair resizing, the sulphur-sulphur bonds are broken. In this, all sulphur-sulphur bonds are first broken using a reducing agent and molded into desired shape. Then an oxidizing agent is used to form a sulphur-sulphur bond back to sulphur, which stabilizes the newly shaped hair and stays in that shape for a long time.

The shape of the hair depends on many things; It also depends on the different region of the world. In countries like Japan, China and Korea, people have straight hair, while the people of Africa have very curly hair and the hair of European people is mixed.

The main reason for having this type of hair in the same area is genetic, for example if your parents have straight hair then you will also have straight hair, if their hair is curly then you will also have curly and if one of them has straight hair and one has curly hair, then your hair will be slightly curly.

People with straight hair and curly hair both have different genes. Changes in the shape of the hair also occur due to the change of genes, due to the change of genes, the hair follicles also change, due to which the shape of the hair also changes. Hair follicle is a microscopic organ from which hair grows. To grow, the hair comes out through the tube attached to this hair follicle, so the size of the hair also depends on the hair follicle. The person whose hair follicles are round, their hair is straight and those who have curly hair, their hair follicles are flat, while those whose hair follicles are oval in shape, their hair is light curly.