Table 2.

Percentage decrease of antioxidant activity (converted to mM of Trolox) of peppermint, chamomile and black tea brews prepared with the use of mineral waters relative to the brew prepared with the use of deionized water.

	Peppermint		Camomile		Black Tea
	Trolox mM	Difference %	Trolox mM	Difference %	Trolox mM	Difference %
Deionised water	10.78 ± 0.16 a 1	0.00	2.30 ± 0.10 a	0.00	15.67 ± 1.51 a	0.00
Baby Zdrój	10.02 ± 0.69 bcd	−7.04	2.15 ± 0.07 a	−6.83	12.82 ± 1.84 b	−18.16
Żywiec	10.19 ± 0.22 abc	−5.52	1.66 ± 0.06 b	−28.16	12.92 ± 0.80 b	−17.57
Tap water	10.62 ± 0.28 ab	−1.46	1.51 ± 0.04 bcd	−34.45	10.31 ± 0.51 c	−34.21
Cisowianka	9.32 ± 0.25 de	−13.58	1.58 ± 0.08 bc	−31.58	10.25 ± 0.72 c	−34.59
Java	9.90 ± 0.13 cd	−8.18	1.50 ± 0.03 bcd	−35.01	8.49 ± 0.26 d	−45.83
Wielka pieniawa	9.98 ± 0.64 bcd	−7.41	1.61 ± 0.11 b	−30.11	6.78 ± 0.77 d	−56.71
Muszynianka	9.39 ± 0.25 de	−12.95	1.36 ± 0.20 d	−40.99	1.20 ± 0.76 f	−92.35
Staropolanka	9.38 ± 0.53 de	−13.00	1.39 ± 0.21 cd	−39.87	3.91 ± 0.75 e	−75.04
Wysowianka	8.71 ± 0.08 e	−19.26	0.87 ± 0.19 e	−62.44	1.02 ± 0.95 f	−93.49

¹ Data are shown as mean  ±  SD. Different letters (a, b, c, etc.) show a significant difference with p < 0.05. The differences relate to each group of brews separately.