Table 2 Comet assay of genomic DNA of human lymphocytes exposed to methanolic extract of Achillea millefolium L. for 3 h

Class 0

90.0 ± 5.0

15.0 ± 5.0

54.3 ± 4.0

76.0 ± 5.3

81.0 ± 6.5

Class 1

4.0 ± 1.7

43.3 ± 11.5

23.3 ± 5.8

10.7 ± 1.2

8.7 ± 1.1

Class 2

3.3 ± 1.5

20.0 ± 13.2

12.3 ± 2.5

6.7 ± 2.8

4.7 ± 0.6

Class 3

1.7 ± 1.1

16.7 ± 7.6

6.0 ± 1.7

4.3 ± 1.5

2.7 ± 2.5

Class 4

1.0 ± 1.0

8.3 ± 2.8

4.0 ± 1.7

2.7 ± 1.1

3.0 ± 2.6

TCS

17.3 ± 13.1

166.7 ± 42.5

78.0 ± 9.6*

47.7 ± 14.1**

38.3 ± 20.1***