. 2018 Apr 23;23(4):983. doi: 10.3390/molecules23040983

Table 2.

Plasma and salivary non-urate and native antioxidant indices for group 1 (with lower combined vitamins C, E, and β-carotene intake) and group 2 (with higher combined vitamins C, E, and β-carotene intake).

Variable	Group 1 (n = 28)	Group 2 (n = 28)	p
FRAP (mmol FeCl₂ L⁻¹)	1.25 ± 0.23	1.15 ± 0.16	NS
Nu-FRAP (mmol FeCl₂ L⁻¹)	0.43 ± 0.09	0.40 ± 0.05	NS
DPPH (% reduction)	25.2 ± 5.7	22.1 ± 4.7	<0.05
Nu-DPPH (% reduction)	5.4 ± 1.5	5.7 ± 2.4	NS
FRAS (mmol FeCl₂ L⁻¹)	6.81 ± 2.85	5.22 ± 2.11	<0.05
Nu-FRAS (mmol FeCl₂ L⁻¹)	1.58 ± 1.01	1.42 ± 0.69	NS
DPPHS (% reduction)	27.6 ± 12.6	24.6 ± 12.8	NS
Nu-DPPHS (% reduction)	5.7 ± 4.1	6.5 ± 5.2	NS

Data are presented as mean ± SD. Nu-FRAS—Non-urate Ferric Reducing Ability of Saliva; FRAS—Ferric Reducing Ability of Saliva; Nu-FRAP—Non-urate Ferric Reducing Ability of Plasma; FRAP—Ferric Reducing Ability of Plasma; Nu-DPPHS—Non-urate 2.2-diphenyl-1-picryl-hydrazyl test of saliva; DPPHS—2.2-diphenyl-1-picryl-hydrazyl test of saliva; Nu-DPPH—Non-urate 2.2-diphenyl-1-picryl-hydrazyl test of plasma; DPPH—2.2-diphenyl-1-picryl-hydrazyl test of plasma; NS—non-significant difference.