Why human skin color varies from one to one ?
Skin color varies according to the dimension of melanin, type of melanin , number of melanin and the distribution of melanin cells. Melanin is produced by cells called melanocytes located in the bottom layer of the skin's epidermis.
Size of melanin in skin
Size of melanin can influence skin color.
According to type of melanin in skin
Melanin are of two types pheomelanin and eumelanin
Pheomelanin: Its a pigment produced by melanin. It is red to yellow in color.
Eumelanin: Its also another pigment produced by melanin. It is black to dark brown color.
A Pigment is nothing but : a substance with the purpose of changes the color of imitate or transmitted light as the result of wavelength-selective fascination. This physical procedure be different from phosphorescence, fluorescence and other forms of luminescence, in which a substance emits light.
Number of pigment in skin
According to the quantity of pigments as well skin color varies.
Distribution in skin
Melanin be able to be found through many layers of the skin, including the outermost layers thus resulting in a much darker skin.
Other factors influencing skin color is haemoglobin and carotene
It is a oxygen carrying red metalloprotein found on redblood cells. as a result the places where blood vessels come closer to the surface of skin gets reddish.
Carotene
It is a yellow to orange color pigment found on fruits and vegetables. Thus excessive intake of such foods will accumulate these pigments in skin resulting in skin color change.
Skin color can vary from dark brown to pale pink from one to one. Melanin forms as a protective layer against the sun light and its formation is influenced by the exposure to sunlight. So people with ancestors in tropical region contain darker skin due to additional exposure to sunlight and viceversa the people with their ancestors from subtropical regions have lighter skin as they are less exposed to sunlight. Exposure in the direction of sunlight is essential as a minimum threshold of Ultraviolet light is needed to penetrate the epidermis to produce vitamin D. Melanin production is the result of the activity of tyrosinase enzyme. So in dark colored skin tyrosinase activity is much more than that in white colored skins.Click here to get home made way to gain natural fair skin
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