Origanum majorana Essential Oil Lacks Mutagenic Activity in the Salmonella/Microsome and Micronucleus Assays

Table 2

Range finding study of the O. majorana essential oil using the TA100 strain.

Substance	Concentration	Without metabolic activation (−S9)		With metabolic activation (+S9)
		NC^a	—		—		—
Essential oil	0.008 µL/mL		0.75		0.98
	0.04 µL/mL				0.86
	0.2 µL/mL
	1 µL/mL		0.00		0.00
	5 µL/mL		0.00		0.00

control: DMSO (10 µL). .