It is a narcotic and may cause withdrawal symptoms if it is stopped too abruptly. Although Norco withdrawal can be quite unpleasant and uncomfortable, you can be assured that it is not life threatening. Norco withdrawal is possible in people who abuse Norco and in people who take Norco for a legitimate medical use.
Definition of melanin for English Language Learners. : a dark brown or black substance that is a natural part of people's skin, hair, and eyes.
What is Melanin? Melanin is one of the major pigments found in human skin, which determines the skin color. It is synthesized by melanocytes, which are located in the skin, eye, ear, hair, and central nervous system of the human body. In addition of providing color, melanin has some other functions, as well.hat is Melanin? Melanin is one of the major pigments found in human skin, which determines the skin color. It is synthesized by melanocytes, which are located in the skin, eye, ear, hair, and central nervous system of the human body. In addition of providing color, melanin has some other functions, as well.