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Melanin ist ein natürlicher Pigmentstoff, der in der Haut, in den Haaren, in den Augen und in bestimmten inneren Organen vorkommt. Es verleiht diesen Geweben ihre charakteristische Farbe und spielt eine entscheidende Rolle beim Schutz gegen schädliche UV-Strahlung.
Funktionen von Melanin
- Hautpigmentierung: Melanin bestimmt die Farbe der Haut und schützt sie vor den schädlichen Auswirkungen der ultravioletten Strahlung der Sonne. Dabei reguliert es den Bräunungsprozess als Reaktion auf die UV-Exposition.
- Haarpigmentierung: Melanin gibt den Haaren ihre natürliche Farbe. Veränderungen im Melaningehalt der Haare führen zu Grauwerden oder Farbverlust.
- Augenpigmentierung: Das Melanin in der Iris bestimmt die Augenfarbe und schützt die Augen vor UV-Strahlen.
- Innere Organe: Melanin ist auch in einigen inneren Organen vorhanden, wo es vermutlich ebenfalls eine schützende Funktionen hat.
Bedeutung von Melanin für die Hautgesundheit
- Melanin schützt die Haut vor Sonnenschäden, indem es UV-Strahlen absorbiert und in Wärme umwandelt.
- Ein Mangel an Melanin kann zu erhöhter UV-Empfindlichkeit und einem höheren Risiko für Hautkrebs führen.
