Table 3.

Cytotoxicity of U. tomentosa extracts to gastric (AGS) and colon (SW620) adenocarcinoma cells as well as to control Vero cells.

Sample Location	AGS Cells IC50 (μg/mL)	SW620 Cells IC50 (μg/mL)	Vero Cells IC50 (μg/mL)
Leaves
Asomat	195 ± 14	118 ± 12	>500
Los Chiles	116 ± 5	120 ± 7	458 ± 17
Palacios	167 ± 17	160 ± 14	>500
Sarapiquí	145 ± 14	149 ± 29	>500
Stems
Sarapiquí	188 ± 20	178 ± 13	>500
Bark
Asomat	215 ± 23	111 ± 4	>500
Los Chiles	196 ± 17	111 ± 8	>500
Palacios	220 ± 13	132 ± 5	>500
Sarapiquí	111 ± 3	142 ± 5	468 ± 13
Wood
Sarapiquí	>500	>500	>500