Alteration of Neutrophil Reactive Oxygen Species Production by Extracts of Devil’s Claw (Harpagophytum)

Table 2

Content of total phenols (TP) and antioxidant capacity (FRAP) of Harpagophytum extracts, presented as mean with standard deviation per dry weight (dw) of the plant material (GAE: gallic acid equivalents).

Accession	Total phenols (mg GAE/g dw)		FRAP (µmol Fe^2+/g dw)
	Mean	SD	Mean	SD
3	28.9	0.4	596.7	25.2
11	13.5	0.6	204.8	0.1
14	25.1	1.3	444.3	13.0
16	5.1	0.3	80.8	13.2
17	2.1	0.4	33.8	0.2
24	3.5	0.5	54.5	5.6
Standard: harpagide	16.7	1.1	149.2	0.0
Standard: harpagoside	0.0	0.0	612.3	3.2
Standard: verbascoside	359.9	9.8	5854.2	52.7