Table 4 Metal chelating activity (MCA), ferric reducing-antioxidant power (FRAP), free radical scavenging capacities, total phenolic content, and total flavonoid content of different extracts of Phyllanthus emblica, Terminalia arjuna, Terminalia bellirica, and Terminalia chebula

Phyllanthus emblica

^ET16.41±1.60^b

21.50±1.51^a

0.56±0.02^c

0.27±0.02^a

345.89±3.28^b

41.55±1.63^c

^E26.13±1.41^c

14.55±0.72^b

0.35±0.03^b

0.53±0.00^c

374.09±12.45^a

87.35±1.65^a

^W11.15±0.42^a

16.81±0.46^b

0.13±0.02^a

0.32±0.01^b

292.89±12.36^c

77.47±6.24^b

Terminalia arjuna

^ET20.34±1.53^c

15.26±0.19^c

0.92±0.01^b

0.21±0.01^a

253.37±28.93^c

95.04±4.21^a

^E13.22±1.84^b

16.43±0.73^b

0.34±0.01^a

1.94±0.24^a

376.61±8.90^b

42.80±1.90^c

^W5.27±0.17^a

21.12±0.19^a

0.41±0.07^a

0.25±0.02^b

446.49±13.37^a

70.41±2.59^b

Terminalia bellirica

^ET14.11±0.23^a

18.50±0.40^c

0.44±0.07^b

0.23±0.01^b

321.46±3.16^b

60.21±1.08^b

^E61.18±7.17^b

21.72±0.87^b

0.37±0.03^a

0.19±0.02^a

405.71±9.35^a

58.02±2.62^b

^W13.20±1.07^a

23.37±0.85^a

0.79±0.05^c

0.26±0.00^b

267.20±4.69^c

84.62±5.98^a

Terminalia chebula

^ET60.97±4.09^c

11.30±0.17^c

0.50±0.06^b

0.36±0.01^b

380.20±7.70^ab

44.37±3.29^c

^E12.47±1.23^b

19.16±0.31^a

0.39±0.01^a

0.21±0.01^a

413.08±21.76^a

85.00±5.43^a

^w4.64±0.17^a

12.25±0.18^b

0.59±0.02^c

0.55±0.01^c

381.28±10.31^b

54.10±1.18^b