The structural protein hair is made of.
Soumm
4 September 2026
A fibrous protein forming the bulk of the hair shaft, produced by cells in the follicle before the hair emerges from the scalp.
Hair above the surface is not living tissue, which is why damage to it cannot be repaired, only managed.
Products can improve the appearance and handling of the shaft. They cannot restore its structure.
See also: Hair Cycle.
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