It is able to withstand ten times more sun than white skin before the skin burns. Blood contains many Vitamin B substances, among them folates, which are best protected in dark skin. Folates are needed in vital processes during cell division.
The greater quantities of melanin give people with black skin some protection against both wrinkles and skin cancer. But that does not prevent you from getting skin cancer completely.
The preference for more golden or 'yellow-toned' skin as healthier might be explained by the 'carotenoid pigments' that we get from the fruit and vegetables in our diet.
Humans with dark skin pigmentation have skin naturally rich in melanin (especially eumelanin), and have more melanosomes which provide superior protection against the deleterious effects of ultraviolet radiation. This helps the body to retain its folate reserves and protects against damage to DNA.
In high-UV environments, darker skin offers protection from the damaging effects of UV radiation, especially to DNA and the valuable nutrient folate. In low-UV environments, there is a trade-off between protection from UV and the need for some UV absorption for the production of vitamin D.
Science does back up these sayings. Darker skin can show age more slowly because it has more melanin (dark pigment that determines sun sensitivity). The more melanin you have, the more protection you have against photoaging, or skin damage from too much exposure to the sun's rays.
I wanted to test skin color separately to find out whether it's important to perceptions of beauty. I found that without regard to physical features, people prefer light brown skin over dark brown skin or pale skin,” said Frisby, associate professor of strategic communication at the School.
Natives of Buka and Bougainville at the northern Solomon Islands in Melanesia and the Chopi people of Mozambique in the southeast coast of Africa have darker skin than other surrounding populations. The native people of Bougainville, Papua New Guinea, have the darkest skin pigmentation in the world.
Nature selects for less melanin when ultraviolet radiation is weak. In such an environment, very dark skin is a disadvantage because it can prevent people from producing enough vitamin D, potentially resulting in rickets disease in children and osteoporosis in adults.
Melanin protects your skin by absorbing harmful rays, including UVA, UVB, UVC and blue light. Protection against reactive oxygen species (ROS). Reactive oxygen species are byproducts of your body's cell processes.
Black skin contains more melanin than lighter skin. Melanin-producing cells may be more susceptible to the effects of inflammation and injury, which may be more noticeable in dark skin than in light skin.
The darkest skin color indicates the presence of three dominant alleles (AABBCC). Therefore dark skin is a dominant character. The lightest skin color indicates the presence of recessive alleles (aabbcc). Because melanin is a dominant phenotype, and all-white skin genes are recessive.
They found: Forearm skin was lighter in African Americans aged ≥65 years vs 18 to 30 years but darker in Caucasians aged ≥65 years vs 18 to 30 years.
Light skin provides better absorption qualities of ultraviolet radiation, which helps the body to synthesize higher amounts of vitamin D for bodily processes such as calcium development.
Blue-eyed, fair-skinned people show more aging skin changes than people with darker, more heavily pigmented skin. With aging, the outer skin layer (epidermis) thins, even though the number of cell layers remains unchanged. The number of pigment-containing cells (melanocytes) decreases.
Caucasian skin has very little pigment to protect your collagen from breaking down at an early age. Northern European caucasians with thinner skin develop visibly rough skin texture with aging and ultraviolet (sun) exposure. Wrinkles can appear as early as your 20s.
Pigmented skin is therefore less sensitive to the sun and its damage, which allows it to keep longer. By this fact, it is considered that a black skin will take 10 years longer to age than a Caucasian skin. This does not mean that black skin does not age.
It is commonly believed that individuals with darker skin are generally less sensitive, while those lighter skin are more sensitive. However, there is little objective data correlating sensitivity with skin type or with objective measures of sensitivity.
Dark skin, which contains more eumelanin than fair skin is better protected against UV-induced damage, and eumelanin is thought to be superior to pheomelanin in its photoprotective properties.
These early humans probably had pale skin, much like humans' closest living relative, the chimpanzee, which is white under its fur. Around 1.2 million to 1.8 million years ago, early Homo sapiens evolved dark skin. But evolutionary biologists haven't been convinced that skin cancer itself drove the evolutionary change.
According to researchers at Penn State University, translucent Irish can thank a genetic code inherited from a single person around 10,000 years ago. A native of either India or the Middle East, carrying the skin pigmentation gene logged as SLC24A5, passed it to the people of Ireland through his ancestors.
If you want to look young and have a great complexion, adapt a lifestyle similar to Japanese women who are known for having smooth, clear and youthful skin. Many Japanese women maintain a diet rich in vitamins and minerals that contain antioxidants.
The rarest skin color in the world is believed to be the white from albinism, a genetic mutation that causes a lack of melanin production in the human body. Albinism affects 1 in every 3,000 to 20,000 people. People with albinism usually have very pale or colorless skin, hair, and eyes.
Women in a recent experiment preferred men with yellower and redder skin tones, both of which can signal good health, a crucial factor in choosing a mate, scientists say.