Polyphenol Content and Antioxidant Activity of Stevia and Peppermint as a Result of Organic and Conventional Fertilization

Table 2

Total phenolics, flavonoids, and condensed tannins in peppermint^a.

Fertilization	Plant	Total phenolics^b	Flavonoids^c	Condensed tannins^d
Organic	Peppermint	0.905 ± 0.055^a	0.112 ± 0.006^a	0.001 ± 0.000^a
Conventional	Peppermint	0.558 ± 0.047^b	0.379 ± 0.037^b	0.017 ± 0.005^b

^aEach value is the mean of three replicates ± standard error. Different letters in each column express significant difference by Student’s t-test. ^bmg of gallic acid equivalents/g of dry sample. ^cmg equivalent of rutin/g of dry sample. ^dmg of (+) catequine equivalent/g dry sample.