Evidence-Based Complementary and Alternative Medicine / 2020 / Article / Fig 1

Research Article

Effect of Thunbergia laurifolia Herbal Tea on Glucose Homeostasis in Healthy Volunteers: A Single-Arm Phase I Study

Figure 1

Chromatogram of Thunbergia laurifolia using ultra-performance liquid chromatography (UPLC) analysis. (a) UPLC fingerprint of the extract of Thunbergia laurifolia under PDA 280 nm. Peak 1 (gallic acid) retention time (RT): 1.537 min; peak 2 (vanillic acid) RT: 5.554 min; peak 3 (caffeic acid) RT: 5.890 min; peak 4 (p-coumaric acid) RT: 7.820 min; and peak 5 (ferulic acid) RT: 8.619 min. (b) spectrum of Thunbergia laurifolia extract that matched with caffeic acid standard.

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