TABLE 2.

Serum measurements of antioxidant capacity, oxidative stress, and antioxidant activity.

Variable	Young (n = 18)		Older (n = 30)
Condition	PL	AO	PL	AO
Vitamin C (μg/ml)	1.4 ± 0.2	2.2 ± 0.2†	1.9 ± 0.2	3.3 ± 0.3†
Thiobarbituric Acid Reactive Substances (TBARS, μM)	1.51 ± 0.19		2.70 ± 0.13*	2.19 ± 0.09†
Ferric-reducing AO power (FRAP, μM/L)	803 ± 32	947 ± 41†	1059 ± 30*	1194 ± 38†
Superoxide Dismutase (SOD, U/ml)	9.4 ± 0.8	10.6 ± 0.8†	8.3 ± 0.3	9.02 ± 0.3†
3-Nitrotyrosine (nM)	242 ± 21	275 ± 32	197 ± 8*	198 ± 9*
Nitrite (μM)	8.0 ± 0.7	8.0 ± 0.7	6.8 ± 1.3*	5.3 ± 0.4*
Nitrite:Nitrate	0.09 ± 0.01	0.11 ± 0.01	0.06 ± 0.01*	0.05 ± 0.01*

PL, placebo; AO, antioxidant.

^*Significant difference between young and older groups, P<0.05;

^†Significant difference between PL and AO, P<0.05.