Detailed information and terminology definitions on the topic of grey hair.

Catalase is an enzyme that is responsible for breaking down hydrogen peroxide.

Tyrosinase is an important enzyme for the formation of natural hair pigments (melanins).

Pigment-forming cells. Melanin is formed here.

Indentation in the skin where the hair roots are located and from where the hair grows.

Stress reaction in the cell triggered by hydrogen peroxide and free radicals.

The fibrous stem known as cortex consists of keratin, and makes up 80 – 90% of the hair mass. The cortex is also where you find the melanin pigments that give the hair its colour.

Keratin-forming cells.

Brown-black melanin pigment.

Red-golden melanin pigment.

Vessel-rich connective tissue in which the hair roots are embedded, and which is responsible for the blood supply.

Pigmentation booster, reactivates melanocytes.

Protect against oxidative stress by breaking down hydrogen peroxide.

Enzyme that is responsible for breaking down free radicals.

Melanin. The hair’s natural colour pigment.

Short-lived, very reactive compounds that are produced by e.g. intense sun exposure, but can also occur as metabolic by-products. Free radicals can lead to damage in the body as they can change proteins, the cell wall and your genetic make-up. That’s why there are mechanisms in our body to remove free radicals (see catalase and glutathione reductase).