The present invention relates to a whitening cosmetic composition comprising a rosemary root extract or a solvent fraction thereof, a whitening food composition, a health functional food for preventing or alleviating a pigmentation disease comprising the composition, and a medicament for the prevention or treatment of a pigmentation disease / RTI The composition comprising the extract or the solvent fraction thereof of the present invention can inhibit the production of melanin and inhibit tyrosinase activity while having no skin irritation and low cytotoxicity, , A health functional food which can prevent or alleviate skin pigmentation disease, or a skin pigmentation disease.
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