Control of cell growth and viability in U-937 and HL-60 cells by water extracts of I'm-Yunity™ (PSP). Both cell types were cultured and treated with different dose of I'm-Yunity™ (PSP) as described in Materials and Methods. Panels A and C show suppression of proliferation of U-937 (panel A) and HL-60 (panel C) cells by increasing concentrations of I'm-Yunity™ (PSP). Panels B and D show reduction of cell viability in U-937 (panel B) and HL-60 (panel D) by I'm-Yunity™ (PSP). Results in panels A-D represent average ± SD of 3–4 experiments.