Figure 2. Cytotoxic effects of Boswellia serrata (BSE) on MDA-MB-231 cells at 24 h of incubation at 37˚C, 5% CO₂/Atm. The data reflect loss of cell viability using FDA which is cleaved only by viable cells. (A) Untreated Control (B) 156 μg/ml (C) 313 μg/ml (D) 626 μg/ml.