what is the scientific term for the protein that makes up human hair?

The scientific term for the protein that makes up human hair is keratin.

Quick Scoop: The Core Answer

Human hair is made primarily of a fibrous structural protein called keratin, which also forms nails and the outer layer of skin.

In many sources you’ll also see the more specific phrase “hair keratin” used to refer to the types of keratin found in hair fibers.

So if you’re asking, “What is the scientific term for the protein that makes up human hair?” — the precise, textbook-style answer is: keratin (specifically, hair keratin).

Mini Breakdown: What That Means

• Hair shafts are largely composed of keratin proteins arranged in tough, fibrous structures.

• These keratins are sometimes classified as hair keratins , a subgroup of keratin found in hair and nails.

• Although hair also contains water, lipids, pigments, and minerals, keratin is by far the dominant protein component.

Tiny Extra Detail (If You’re Curious)

Scientists often distinguish between different keratins (like KRT81 and other “hair keratins”) encoded by many keratin genes in the human genome.

But in everyday scientific and medical language, when someone asks which protein makes up human hair, the accepted single-word term is keratin.

TL;DR: The protein that makes up human hair is called keratin (more specifically, hair keratin).🧬

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