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Carotene is a lipochrome that normally adds yellow color to the skin. With elevated blood levels of carotene, the prominence of this yellowing is increased. Carotenemia may be particularly evident when the stratum corneum is thickened or when the subcutaneous fat is strongly represented.arotenemia is a clinical condition characterized by yellow pigmentation of the skin (xanthoderma) and increased beta-carotene levels in the blood.
1 Review. Hydroquinone decreases the formation of melanin in the skin. Melanin is the pigment in skin that gives it a brown color. Hydroquinone topical (for the skin) is used to lighten areas of darkened skin such as freckles, age spots, melasma (sun damage), or chloasma (darkened skin caused by hormonal changes).