Vitiligo occurs when pigment-producing cells (melanocytes) die or stop producing melanin — the pigment that gives your skin, hair and eyes color. The involved patches of skin become lighter or white. It's unclear exactly what causes these pigment cells to fail or die.
Vitiligo is caused by the lack of a pigment called melanin in the skin. Melanin is produced by skin cells called melanocytes, and it gives your skin its colour. In vitiligo, there are not enough working melanocytes to produce enough melanin in your skin. This causes white patches to develop on your skin or hair.
The skin color of people with light skin is determined mainly by the bluish-white connective tissue under the dermis and by the hemoglobin circulating in the veins of the dermis.
If your body makes too little melanin, your skin gets lighter. Vitiligo is a condition that causes patches of light skin. Albinism is a genetic condition affecting a person's skin. A person with albinism may have no color, lighter than normal skin color, or patchy missing skin color.
White skin evolved in homo sapiens who moved north into climates with less sun. This adaptation meant that white skin was less able to synthesize vitamin d. The dark skinned people that lived up north also live on the coasts, and have a diet rich in sea food. Sea food is much higher in vitamin d.
Results indicated that preference for light skin tones were associated with increased levels of self-esteem. Higher levels of ethnic identity attitude were associated with preference for medium skin tones. Finally, there was a trend for participants with darker skin tones having a preference for medium skin tone.
The earliest documented representative of the genus Homo is Homo habilis, which evolved around 2.8 million years ago, and is arguably the earliest species for which there is positive evidence of the use of stone tools.
Explanation: Genetics play a significant role in determining your skin's color. While treatments like chemical peels or laser toning can help reduce pigmentation, dark skin cannot be naturally transformed into a fair complexion.
The number of pigment-containing cells (melanocytes) decreases. The remaining melanocytes increase in size. Aging skin looks thinner, paler, and clear (translucent). Pigmented spots including age spots or "liver spots" may appear in sun-exposed areas.
Currently, several vitamins and supplements are being investigated for their ability to boost melanin production. However, the best way to support melanin production and good skin health is to eat a healthy diet full of vegetables, fruit, and whole grains.
Average skin colors are seen as most attractive. Typically, tan is the average skin color, making it very attractive to most people. However, the most attractive skin color varies on preference, culture, and sex. A healthy skin complexion and rosy “glow” is always considered attractive.
Jackson usually avoided wearing patterned clothing to avoid attention to the disorder. Jackson's autopsy confirmed that he had vitiligo. His skin was found to have reduced (though not absent) melanocytes, the cells active in skin pigmentation. Vitiligo occurs in three different patterns.
Natural skin whitening can be achieved through the following methods: Lemon Juice: The goodness of vitamin C in lemon juice helps lighten skin when applied regularly. Aloe Vera: The natural soothing properties of aloe vera gel can help lighten skin by reducing pigmentation.
The main factor initiating the development of light skin was seen as a consequence of genetic mutation without an evolutionary selective pressure. The subsequent spread of light skin was thought to be caused by assortive mating and sexual selection contributed to an even lighter pigmentation in females.
One may also notice maceration after wearing non-breathable plastic or latex rubber gloves, which trap moisture against the skin. Wrinkles are the first sign that the skin is over-hydrated. In addition, macerated skin becomes extremely soft and takes on a whitish appearance.
Paleness may be the result of decreased blood supply to the skin. It can also be due to decreased number of red blood cells (anemia). Paleness of the skin is not the same as loss of pigment from the skin. Paleness is related to blood flow in the skin rather than deposit of melanin in the skin.
The average age of onset of vitiligo is in the mid-twenties, but it can appear at any age. The size and number of patches varies from person to person. The condition tends to progress over time, with larger areas of the skin losing pigment.
Evidence is presented here that the decrease in mean melanin content we have measured in old age is due, not to a general decline in melanin in all cells, but rather to a selective loss of those nerve cells containing greatest amounts of pigment.
The answer is no. Of course, you can lighten the skin but you cannot make it fair by applying creams or undergoing various fairness treatments. Rather, you shouldn't play with your skin hoping that a particular treatment will change its tone drastically.
The Role of Genetics in Skin Color
If both parents have fair skin, the baby is more likely to have fair skin, and the same applies if both parents have darker skin. However, there can also be variations in skin color among siblings due to the complex interplay of genes.
Scientists are sure that Homo sapiens first evolved in Africa, and we know that every person alive today can trace their genetic ancestry to there. It has long been thought that we began in one single east or south African population, which eventually spread into Asia and Europe.
With an environment devoid of oxygen and high in methane, for much of its history Earth would not have been a welcoming place for animals. The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old.
A new genomic study has revealed that Aboriginal Australians are the oldest known civilization on Earth, with ancestries stretching back roughly 75,000 years.