Kutheni sisiba nezimvi, yaye kutheni abanye abantu bangabi nezimvi?

Umbala weenwele zakho ulawulwa ngeendlela ezahlukeneyo ze-melanin pigment, kwenzeka ntoni kwi-melanin ngokukhula?

Iinwele ezingwevu zisisiphumo sokuncitshiswa kwezixa ze-melanin ezinweleni, i-pigment efumaneka phantse kuzo zonke izinto eziphilayo, hayi nje ebantwini. Yikhompawundi efanayo eqinisa ulusu lwakho ekuphenduleni ukukhanya kwelanga.

Ngolunye uhlobo, kubangela iinwele ezimdaka okanye ezimnyama, ngelixa enye i-compound ijongene neenwele ezibomvu kunye ne-freckles.

Ezi seli ziveliswa kwiiseli ezikhethekileyo ezibizwa ngokuba yi-melanocytes ezifumaneka ngaphakathi kweefollicle zeenwele eluswini.

Njengoko abantu besiya bekhula, i-melanocyte iyancipha kwaye ivelise i-melanin encinci, de ekugqibeleni ife kwaye ayithathi indawo yayo.

Emva koko iinwele zikhula ngaphandle kombala kwaye ziyabonakala. Uninzi lomahluko lufuzo, kodwa ezinye izinto ezinjengokutya okungalunganga, ukutshaya kunye nezinye izifo zinokubangela ukuba zibe ngwevu kwangaphambi kwexesha.

Kwanomothuko ombi maxa wambi unokukhokelela ekubeni iinwele zibe ngwevu ngokukhawuleza.