| 摘要 |
PURPOSE: A whitening agent containing a Polygonum aviculare Linne. extract as a main component is provided. Whereby, the whitening agent has low skin irritation while showing an excellent deactivation effect against tyrosinase and melamine production-inhibiting effect. CONSTITUTION: The whitening agent containing 0.0001 to 5% by weight of the Polygonum aviculare Linne. extract is prepared by extracting Polygonum aviculare Linne. in C1-3 anhydrous or hydrous alcohol, or ethyl acetate at 4 to 30deg.C for 3 to 20 days and concentrating. For example, 100g Polygonum aviculare Linne. is cut and extracted in 1L ethyl alcohol(70%) at room temperature for 10 days, filtered with a filter paper with 300 mesh, left alone for 1 week and then concentrated at 50deg.C after filtering.
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