Fig. 2From: Anti-aging and tyrosinase inhibition effects of Cassia fistula flower butanolic extractCytotoxicity of C. fistula flower extract on skin fibroblasts. The cells were treated with or without various concentrations of the flower extract (0–200 μg/mL) for 48 h. The cell viability was determined using SRB assay. All assays have been performed in triplicate and the mean ± standard deviations are shownBack to article page