| abstract |
PURPOSE:To obtain an external preparation having excellent ultraviolet preventing effect and beautifying effect, hardly causing quality deterioration for a long period and having excellent stability, by blending isoferulic acid with an antioxidant. CONSTITUTION:(A) Isoferulic acid having ultraviolet absorbing action and tyrosinase activity inhibiting action together and/or salt thereof is blended with (B) an antioxidant, e.g. gamma-tocopherol, geraniyn, sodium erisorbinate, BHT or BHA (especially joint use of gamma-tocopherol and BHT). The components A is blended at an amount of >=0.01wt.%, especially 0.5-10wt.% and the component B is blended in the range of >=1/1,000 based on the component A. |