. 2020 May 22;9(5):447. doi: 10.3390/antiox9050447

Table 1.

Antioxidant potential: DPPH (2.2-Diphenyl-1-Picrylhydrazyl) free radical method, ferric ion reducing antioxidant power (FRAP)), the total polyphenols content (TPC) and total flavonoids content (TFC) in Kombucha tea.

Type of Beverage	Time Points (Day)	Total Flavonoids Content (TFC) [mg/L]	DPPH [%]	FRAP [µM Fe(II)/L]	Total Polyphenols Content (TPC) [mg/L]
Green Tea Kombucha—GK	tea	254.1 ± 8.6 *^,2,3,4,5	80.33 ± 2.00 *^,2,3,4	5374.1 ± 62.1 *^{,1,2,3,5,9,13}	269.0 ± 0.9 *^,3,4,5,9,13
	1	196.2 ± 2.6 *^,1,3,4,10,14	94.61 ± 1.29 *^{,1,3,4,6,10,14}	3626.3 ± 36.8 *^{,1,3,4,6,10,14}	277.6 ± 0.4 *^,3,4,6,10,14
	7	146.8 ± 3.4 *^{,1,2,4,7,11,15}	91.40 ± 0.57 *^{,1,2,4,7,11,15}	4801.1 ± 69.2 *^,1,2,7,11,15	299.6 ± 3.1 *^{,1,2,4,7,11,15}
	14	181.3 ± 4.8 *^{,1,2,3,8,12,16}	88.23 ± 0.83 *^{,1,2,3,8,12,16}	3172.9 ± 379.7 *^,1,2,8,12,16	320.1 ± 3.5 *^{,1,2,3,8,12,16}
Black Tea Kombucha—BK	tea	231.7 ± 11.0 *^{,1,6,7,8,9,13}	70.40 ± 0.78 *^,1,6,8,9,13	4486.7 ± 65.0 *^{,1,6,7,8,9,13}	183.1 ± 2.3 *^,6,7,8
	1	149.1 ± 0.6 *^{,2,5,7,8,10,14}	78.62 ± 0.63 *^{,2,5,7,8,10,14}	2274.0 ± 36.2 *^,2,5,7,10,14	201.0 ± 5.7 *^,5
	7	90.5 ± 0.7^*5,6,8,11	70.63 ± 0.53 *^,6,3,11,15	2725.9 ± 41.0 *^{,5,6,8,7,11,15}	219.5 ± 2.1 *^,5,3,7,15
	14	126.7 ± 5.2 *^,5,6,7	61.04 ± 1.99 *^{,4,5,6,7,12,16}	1573.9 ± 182.1 *^,4,5,7,12,16	206.0 ± 1.2 *^,5,4,6,12
White Tea Kombucha—WK	tea	209.3 ± 3.1 *^,5,10,11,12	78.55 ± 0.35 *^,10,12,1	4890.0 ± 8.90 *^{,1,5,10,11,12,13}	184.6 ± 2.0 *^,10,11,12
	1	132.6 ± 4.8 *^{,2,6,9,11,12,14}	89.01 ± 0.99 *^,9,11,12	2555.4 ± 26.2 *^{,2,6,9,11,12,14}	200.8 ± 7.6 *^,9,10,11
	7	83.8 ± 3.3 *^,7,9,10,12	79.13 ± 0.93 *^{,9,10,12,3,7,15}	3263.8 ± 46.3 *^{,3,7,9,10,12,15}	205.6 ± 3.0 *^{,3,7,9,10,12,15}
	14	111.6 ± 2.2 *^,9,10,11	70.42 ± 1.38 *^,9,10,11,16	2290.6 ± 171.0 *^{,4,8,9,10,11,16}	228.1 ± 0.5 *^{,4,8,9,10,11,16}
Red Tea Kombucha—RK	tea	395.9 ± 2.0 *^{,1,5,9,14,15,16}	78.54 ± 0.06 *^,5,14,16	5261.9 ± 26.5 *^{,1,5,9,14,15,16}	229.5 ± 2.9 *^,15,16,1,5,9
	1	292.5 ± 2.3 *^{,2,6,10,13,15,16}	89.56 ± 0.08 *^,13,15,16	2704.6 ± 7.3 *^{,2,6,10,13,15,16}	219.8 ± 22.8 *^,15,16
	7	198.1 ± 2.9 *^{,3,7,11,13,14,16}	77.37 ± 0.80 *^{,3,7,11,14,16}	4314.3 ± 53.5 *^{,3,7,11,13,14,16}	270.5 ± 2.4 *^{,3,7,11,13,14}
	14	242.5 ± 4.8 *^{,4,8,12,13,14,15}	74.78 ± 2.11 *^,12,13,14,15	2692.5 ± 202.8 *^{,4,8,12,13,14,15}	271.9 ± 3.6 *^{,4,8,12,13,14}

* FDR p ≤ 0.05 between type of Kombucha (0, 1, 7, 14 days of fermentation), p ≤ 0.05 between particular subgroup: ¹—GK tea, ²—GK 1, ³—GK 7,⁴—GK 14,⁵—BK tea,⁶—BK 1, ⁷—BK 7, ⁸—BK 14, ⁹—WK tea, ¹⁰—WK 1, ¹¹—WK 7, ¹²—WK 14, ¹³—RK tea, ¹⁴—RK 1, ¹⁵—RK 7, ¹⁶—RK.