Figure 1.

The effect of labdanum resin extracted by the Andalusian process (Adl), its purified flavonoid (Flv) and diterpenoid extracts (Dit), and labdanum resin extracted by the Zamorean process (Zam) on Human epithelial colorectal adenocarcinoma (Caco-2) and Human hepatocellular carcinoma (HepG2) cells viability (% of control) after 24 and 48 h incubation (3 independent experiments of n = 4 each). * means statistical differences in relation to the control by the post hoc Tukey’s test (α = 0.05). # means statistical differences between incubation times by the post hoc Tukey’s test (α = 0.05).