Table 2.

Concentration effect of Ruellia tuberosa L. (RTL; containing stems and leaves) water and ethanol extracts on the cell viability of mouse C2C12 myoblasts

	Cell viability (%)a
	RTL extracts (μg/ml)
	25	50	100	200	400	800
Water extracts	100.5 ± 9.2	97.8 ± 4.6	97.6 ± 1.4	90.1 ± 4.7	91.7 ± 2.9	91.9 ± 3.3
Ethanol extracts	99.6 ± 4.4	105.5 ± 6.6	98.0 ± 4.9	86.2 ± 5.6	102.3 ± 12.8	108.1 ± 11.4

Each value is means ± SD (n = 3).

$$\text{Cell viability}(\%)=\frac{\text{Sample group}-\text{Blank group}}{\text{Control group}-\text{Blank group}}\times 100\%.$$

^aValues are percentage relative to control value (100%).