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. 2021 Nov 23;16(11):e0260463. doi: 10.1371/journal.pone.0260463

Fig 1. The mean ± SE FRAP antioxidant capacity (a), phenolic concentration (b), and flavonoid concentration (c) of the methanolic fraction of two bottles each of St. John’s Wort (SJW), Turmeric (T), and Valerian Root (VR) from three different suppliers.

Fig 1

The mean ± se from each bottle was calculated from 10 pills per bottle. An * indicates that bottle 1 is significantly different from bottle 2 according to ANOVA (p < 0.05).