. Author manuscript; available in PMC: 2010 Nov 11.

Published in final edited form as: J Agric Food Chem. 2009 Nov 11;57(21):10014–10021. doi: 10.1021/jf9020224

Table 2.

Weight Content (%) of Gingerols and Shogaols in Ginger Dietary Supplements

Commercial product	Sample	6- gingerol (wt%)	8- gingerol (wt%)	10- gingerol (wt%)	6- shogaol (wt%)	8- shogaol (wt%)	10- shogaol (wt%)
Ginger Dietary Supplement A	Mean^a	0.2619	0.0482	0.0468	0.1685	0.0074	0.0015
Ginger Dietary Supplement A	RSD%^b	8.8	6.1	4.3	6.0	7.5	6.7

Ginger Dietary Supplement B	Mean	0.3132	0.0621	0.0620	0.1891	0.0107	0.020
Ginger Dietary Supplement B	RSD%	8.8	6.1	4.3	6.0	7.5	6.7

Ginger Dietary Supplement C	Mean	0.1354	0.0220	0.0215	0.1085	0.0033	0.0006
Ginger Dietary Supplement C	RSD%	1.9	8.9	8.8	6.7	7.7	9.1

Mean value was obtained by the analysis of three capsules of each commercial dietary supplement with same lot number.

SD % -- Relative Standard Deviation