healthy hair, Pantene, Head & Shoulders, Procter & Gamble, P&G, Beauty Science, hair health The World of Hair

 an on-line reference by Dr. John Gray,
provided by the P&G Hair Care Research Center.
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Page 60 -- HAIR AND MELANIN

Hair pigmentation melanin and hair color Gray Hairs - Greying Hair Cosmetic Hair Treatments
Melanin distribution

Melanin granules are spread out throughout the cortex of the hair. There are more of them near the outer edge of the cortex than towards the middle. The darker the hair, the more melanin granules it contains.

Effects of weathering

The ends of the hair may look lighter than the rest, because of the normal weathering that affects everyone's hair. Heavily weathered hair, which is often brittle, tends to look lighter too.

Red hair

Red hair is relatively uncommon in Europe, except in Scotland: more than one in ten Scots are redheads. Red-haired people often have pale skin that burns easily.

  

weathered hair

Seriously weathered hair: she needs to see a hair stylist, urgently!

Celtic hair pigmentation

This woman's coloration is typically Celtic: her hair pigment consists overwhelmingly of phaeomelanin, her skin is freckled and tends to bum easily, and her eyes are blue
Hair pigmentation melanin and hair color Gray Hairs - Greying Hair Cosmetic Hair Treatments