Table 4.

St. John's wort formulations

Manufacturer	Species	Plant part	Preparation	Standardization	Stated amount of marker (mg)	Measured amount marker (mg) (average of two lots)	Percent of label claim	Suggested servings per day	Total daily dose of marker compound (mg)
a	Hypericum perforatum	Aerial parts	Extract	0.3% hypericin	0.9	0.83 ± 0.18	93 ± 20%	3	2.49
b	Hypericum perforatum	Herb/flowers	Extract	0.3% hypericin	0.9	0.89 ± 0.08	99 ± 9%	2–4	1.78–3.56
c	N/A	N/A	N/A	N/A	0.45	0.40 ± 0.09	88 ± 19%	4–6	1.6–2.4
d	Hypericum perforatum	Aerial parts	Extract	0.3% hypericin	0.9	0.86 ± 0.09	96 ± 10%	3	2.58
e (lot 1)*	Hypericum perforatum	Aerial parts	Extract	0.3% hypericin	0.9	0.97 ± 0.05	107 ± 6%	3	2.91
e (lot 2)*	Hypericum perforatum	Aerial parts	Extract	0.3% hypericin	0.45	0.50 ± 0.02	110 ± 4%	6	3.0
f (lot 1)*	Hypericum perforatum	Herb/flowers	Extract	0.3% hypericin	0.9	0.84 ± 0.02	94 ± 2%	2	1.68
f (lot 2)*	Hypericum perforatum	Herb/flowers	Extract	0.3% hypericin	0.45	0.46 ± 0.13	102%	4	1.84
g	Hypericum perforatum	Aerial parts	Extract	0.3% hypericin	0.9	0.94 ± 0.13	105 ± 14%	1–3	0.94–2.82
h	N/A	N/A	N/A	N/A	0.9	1.25 ± 0.04	139 ± 5%	2	2.5

*Reported as two separate products since lots were different preparations;

N/A = information not available.