Why does curly hair curl?
Ever wondered why your hair decides to spring up into curls while everyone else you know has hair that's straight as a ruler?
It’s not just a styling choice – it’s science! Unravelling the mystery of why hair curls (or doesn’t) takes us down to the very core of hair biology, genetics, and a touch of physics. So let’s dive into the curly, coily, and sometimes complicated world of curly hair!
What makes hair curly?
At the heart of each strand of hair is the follicle, and the shape of this follicle plays a pivotal role in determining whether your hair is straight, wavy, or curly. Curly hair follicles are oval-shaped and asymmetrical, causing the hair to curl as it grows. This shape means the hair shaft is twisted and turned from the root, leading to those luscious loops and twists.
It’s all in the genes
Curly hair is largely determined by genetics. The specific genes involved in making hair curly are still a subject of research, but scientists agree that curly hair traits are inherited. So, if you’ve got curls, chances are someone else in your family tree passed down their curly cues to you!
The role of disulfide bonds
Beyond follicle shape and genetics, the biochemistry of your hair also plays a part. Curly hair has more disulfide bonds between the proteins in the hair strand. These bonds create a stronger chemical link on one side of the hair shaft than the other, causing it to bend – and voila, curls happen!
How common is curly hair?
Curly hair varies widely across different populations but studies suggest around 45% of people of European decent have wavy hair, and about 15% have curly or very curly hair. These figures change dramatically across different ethnic groups and regions. For instance, in Africa and Asia, the prevalence and type of curl can vary widely from tight coils to loose waves. Here in Australia, with our rich blend of cultures, there is a wide spectrum of hair textures that reflect diverse genetic backgrounds.
Caring for your curls
Curly hair isn’t just about good looks; it’s about physics and biology. Because of its structure, curly hair is often dryer and more prone to breakage than straight hair. This is why it’s crucial to give your curls a little extra love and moisture. Think of your hair care routine as a science experiment where hydration plus care equals glorious curls!
Embracing the bounce
Understanding the science behind your curls can help you take better care of them. It’s a unique trait that makes you stand out in the crowd — whether it’s tight spirals, loose waves, or anything in between. So next time you look in the mirror, give a little nod to the amazing biological and chemical forces that make your hair uniquely yours.
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Check out more of our advice here.
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