A hair becomes curly primarily due to the shape of its follicle.
The Role of Hair Follicles
The hair follicle, the structure beneath the skin from which hair grows, is a key factor in determining whether hair will be straight or curly.
- Straight Hair: A straight follicle produces straight hair.
- Curly Hair: A curved follicle produces curly hair.
Protein Distribution
The distribution of proteins within the hair shaft also plays a crucial role:
- Even Distribution: More evenly distributed proteins result in straighter hair.
- Uneven Distribution: Less evenly distributed "squiggly proteins" lead to curlier hair.
Genetic Influence
Genetics are also a significant factor in determining hair curliness. Your genetic code impacts:
- Cortex Shape: The shape of the cortex, the middle layer of the hair, is determined by your genes.
- Hair Shape and Thickness: The cortex shape influences the overall shape and thickness of your hair.
Summary Table
| Factor | Straight Hair | Curly Hair |
|---|---|---|
| Follicle Shape | Straight | Curved |
| Protein Distribution | Evenly Distributed | Unevenly Distributed "squiggly proteins" |
| Genetic Code | Influences cortex for straightness | Influences cortex for curliness |
In essence, the combination of a curved follicle, uneven protein distribution, and genetic predisposition result in curly hair.
