American kava is young enough that scepticism is fair. A grower can call a plant Borogu, but a name travels on a cutting, not on a certificate, and cuttings get mislabelled, mixed and renamed across decades of hobbyist exchange. So for American Kava Association Technical White Paper No. 2 we did not ask anyone to take the names on trust.
Three American-grown cultivars, Kali-ISA, Kali-Rogu and Kali-Hiwa, grown at the AKA Research Greenhouse in Sacramento, were run through three independent identity checks. Flora Research Laboratories of Grants Pass, Oregon performed HPTLC fingerprinting against two authenticated Piper methysticum reference materials and HPLC-UV quantification of all six major kavalactones and the flavokavains. Separately, our in-house KavaLytics programme classified each lot from its near-infrared spectrum. All three methods agreed.
The material assayed between 7.09% and 14.29% total kavalactones, with flavokavains below 0.4% and at 1.6–2.5% of total kavalactones across every lot, the signature of beverage-grade kava rather than tudei-type material. Kali-Hiwa (chemotype 463251) and Kali-Rogu (423561) classify as noble; Kali-ISA reads 254631, an ISA-type chemotype. What follows is a walkthrough of each method, the lab numbers, the TLC plates, and why a 19.9% figure out of a Florida field is not the anomaly it might be viewed as.