Fig. 4From: In vitro assessment of the cytotoxic effects of secondary metabolites from Spirulina platensis on hepatocellular carcinomaEvaluation of the cellular viability with different concentrations of phenolic compounds, alkaloids, and aqueous and methanolic extracts of S. platensis on HepG2 cells (a) and fibroblast cells (b) after 24 h incubation. Values are mean ± SD (n = 3)Back to article page