Table 1 Total phenolics, flavonoids, tannins and antioxidant activity of the green, black and yellow tea leaves

4.116 ± 0.113^a

3.776 ± 0.004^a

1.045 ± 0.003^a

18.825 ± 0.094^a

29.345 ± 0.124^a

2.433 ± 0.213^b

1.679 ± 0.037^b

0.658 ± 0.004^b

16.846 ± 0.046^b

23.007 ± 0.283^b

2.262 ± 0.113^b

1.557 ± 0.026^b

0.691 ± 0.001^c

16.040 ± 0.503^c

20.738 ± 0.171^c

1.109 ± 0.149^c

0.671 ± 0.041^c

0.375 ± 0.002^d

13.109 ± 0.125^d

16.067 ± 0.286^d

1.139 ± 0.064^c

0.326 ± 0.017^d

0.263 ± 0.003^e

12.241 ± 0.346^e

16.356 ± 0.314^d

0.575 ± 0.049^d

0.220 ± 0.022^e

0.168 ± 0.003^f

11.930 ± 0.434^f

13.064 ± 0.132^e

6.629 ± 0.121^e

X

1.948 ± 0.001^g

26.521 ± 0.081^g

40.733 ± 0.314^f

5.108 ± 0.135^f

X

1.556 ± 0.002^h

21.427 ± 0.262^h

32.237 ± 0.251^g

3.823 ± 0.142^g

X

1.168 ± 0.003ⁱ

20.382 ± 0.046ⁱ

32.815 ± 0.472^g

3.662 ± 0.199^g

X

1.066 ± 0.004^a

19.159 ± 0.162^j

27.055 ± 0.289^h

4.226 ± 0.270^h

X

1.256 ± 0.001^j

18.002 ± 0.062^k

27.032 ± 0.032^h

3.733 ± 0.242ⁱ

X

0.941 ± 0.002^k

17.513 ± 0.088^l

26.120 ± 0.075ⁱ