Melanin determines skin and hair color. It also is present in the skin in varying degrees, depending on how often a population has been exposed to the sun in the past. Melanin can be found in the pupils or irises of the ... More »

According to The Journal of Nutrition, melanin and carotene are two of three pigments that determine skin color. The third pigment is hemoglobin. All three pigments are made in the epidermal layer of the skin. More »

Mayo Clinic cites ultraviolet light from both the sun and tanning beds as the most common cause of skin cancer. Other potential causes that do not involve sunlight are fair skin, excessive moles, living at a high altitud... More » Health Conditions & Diseases Cancer

The fact that human lips contain less melanin than the rest of the skin combined with the fact that they are composed of fewer skin layers results in their pink color. The exact color depends on the color of underlying t... More » Science Human Anatomy

Melanin production is accelerated by exposing the skin to ultraviolet A and ultraviolet B sunlight, according to Mayo Clinic. Melanin also is increased by exposure to the ultraviolet light found in tanning beds and sunla... More »

Melanin, which creates dark pigmentation in skin, is responsible for giraffe tongues' dark color. Although it is unknown exactly why giraffes have tongues that appear blue, purple and sometimes almost black, scientists b... More »

A face whitening cream is a skin-lightening product used to lighten the melanin in the skin and hyperpigmentation, such as acne scars and age spots. Face whitening creams usually contain the ingredient hydroquinone. The ... More »