Understanding Hair Color: Melanin, Genetics & Types
What Determines Hair Color?
Primarily the amount and type of melanin in hair follicles.
- Eumelanin: Brown/black pigment.
- Pheomelanin: Red pigment.
Genetics control melanin-stimulating hormone (MSH) → melanin production. More MSH = darker hair.
Other Influences
- Age: MSH decreases → gray hair.
- Diet: Nutrients affect hair health and pigmentation.
- Sunlight: UV breaks down melanin → lightening.
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