The direct and indirect effects of µCAP on glioblastoma (U87MG-RedFluc) cancer cells were investigated in vitro<i>.</i> The results indicate that µCAP generates short- and long-lived species and radicals (i.e., hydroxyl radical (OH), hydrogen peroxide (H₂O₂), and nitrite (NO₂<sup>-</sup>), etc.) with increasing tumor cell death in a dose-dependent manner.