Table 5.

Kava kava 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	Piper methysticum	Root	Extract	30% kavalactones	60	25.1 ± 1.9	42 ± 3%	3–4/day	75.3–100.4
b (lot 1)*	Piper methysiticum	Root	Extract	30% kavalactones	53	55 ± 0.8	104 ± 2%	4/day	220
b (lot 2)*	Piper methysiticum	Root	Powder	kavalactones	10	13.3 ± 0.4	133 ± 4%	6/day	79.8
c	N/A	N/A	N/A	N/A	—	13.9 ± 0.3	—	3/day	41.7
d	Piper methysiticum	Root/rhizome	Extract	30% kavalactones	60	65.9 ± 2.4	110 ± 4%	1–3/day	65.9–197.7
e	Piper methysticum	Root	Extract	30% kavalactones	45	44.4 ± 1.3	98 ± 3%	2–4/day	88.8–177.6
f	Piper methysticum	Root	Extract	70 mg kavalactones	70	62.8 ± 5.5	90 ± 8%	1/day	62.8
g	Piper methysiticum	Root/rhizome	Extract	30% kavalactones	60	63.2 ± 1.4	105 ± 2%	1–3/day	63.2–189.6

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

N/A = information not available.