Figure 4.

Stimulatory effect of Vitreoscilla filiformis extract (Vfe) on skin cell renewal rate in vivo (mean ± SD). In 22 women, volunteers aged from 24 to 55 years, the effect of Vfe 1% versus a control formula on the cell renewal rate after 2 weeks of pre-treatment and 10 days of treatment was evaluated by the decrease in skin colour after staining using 10% dihydroxyacetone (DHA) cream, as measured by Chroma meter CR400. Parameter b* values before and after treatment showed that the DHA-induced colour decreased significantly more rapidly on the arm treated with the formula containing Vfe 1% than on the arm treated with the vehicle cream. *p < 0.05 compared with vehicle cream.