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Melanin is produced through a multistage chemical process known as melanogenesis, where the oxidation of the amino acid tyrosine is followed by polymerization. Pheomelanin is a cysteinated form containing polybenzothiazine portions that are largely responsible for the red or yellow tint given to some skin or hair colors. Neuromelanin is found ...
In short, melasma is a chronic skin condition that appears as darkened areas on the face due to an overproduction of melanin, says Gina Charles, MO, a family physician specializing in skincare. It ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 December 2024. "Skin pigmentation" redirects here. For animal skin pigmentation, see Biological pigment. Extended Coloured family from South Africa showing some spectrum of human skin coloration Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among ...
Skin whitening, also known as skin lightening and skin bleaching, is the practice of using chemical substances in an attempt to lighten the skin or provide an even skin color by reducing the melanin concentration in the skin. Several chemicals have been shown to be effective in skin whitening, while some have proven to be toxic or have ...
However, some studies show that melanin — another genetically inherited substance in the skin — can help protect against sun-induced aging. Darker skin tones contain more melanin than lighter ...
In the context of skin, “kojic acid blocks the production of tyrosinase, which is critical for the formation of melanin, the pigment molecule in the skin,” says Carmen Castilla, M.D., a board ...
— Including at least 25% of patients with darker skin complexion in each study; — Evaluating pigmentation of every study participant using at least two different methods, one based on a researcher's evaluation and another based on scientific, light-based measurement of melanin levels in the skin.
The primary cause of melanoma is ultraviolet light (UV) exposure in those with low levels of the skin pigment melanin. [2] [10] The UV light may be from the sun or other sources, such as tanning devices. [2] Those with many moles, a history of affected family members, and poor immune function are at greater risk. [1]
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