Capability of Boswellia sacra essential oil in suppressing multicellular spheroid growth. Breast cancer T47 cells (1 × 104) were seeded into each well of the 96-well NanoCulture® plates. Following the formation of spheroids, cells were either (A) left untreated or treated with 78 oC essential oil at (B) 1:800 or (C) 1:600 dilution, or 100 oC essential oil at (D) 1:1,500 or (E) 1:1,200 dilution. Spheroids images were captured at 24 hours following essential oil treatment at 100x magnification. Experiments were repeated at least 3 times and representative images are presented.