Increased antioxidant capacity in healthy volunteers taking a mixture of oral antioxidants versus vitamin C or E supplementation.
The objectives of this study were (1) to evaluate the capacity of human plasma that had been obtained from healthy adult volunteers before and after they ingested vitamin E or C to inhibit induced lipoperoxidation in vitro (antioxidant capacity of plasma [ACP]), and (2) to compare the efficiency of these vitamins with that of a commercial mixture of antioxidant vitamins, cofactors, and minerals (MAOx). Seventy-nine healthy individuals between 19 and 23 y of age were randomly assigned to 1 of 4 groups. Each received a daily dose of antioxidants for 7 d: vitamin C (n=18; 500 mg), vitamin E (n=21; 400 IU), vitamins C and E (n=19), or MAOx (n=21; 1.2 g). ACP and plasma malondialdehyde were measured at 4 and 24 h and 7 d. ACP increased significantly (P<.05) in all 4 groups within 4 h of antioxidant intake, and this effect was sustained throughout supplementation. Plasma ACP increased significantly over basal values in the group taking MAOx; relative increases were 42%, 44%, and 55% at 4 h, 24 h, and 7 d, respectively (P<.001). Smaller increases in plasma ACP were observed in the vitamin C group (25%, 32%, and 36%) and, specifically, in the vitamin E group (17%, 24%, and 28%) (P<.05). The mixture of vitamins and minerals was comparatively more efficient than vitamin C or E alone, presumably because MAOx contains various antioxidant compounds with different redox potentials, leading to the possible development of chain reactions.
Lara-Padilla
Eleazar
E
Postgraduate Department, Medical School of High Studies, National Politechnical Institute, Mexico City, Mexico.
Kormanovski
Alexander
A
Grave
Pindaro Alvarez
PA
Olivares-Corichi
Ivonne Maria
IM
Santillan
Roberto Medina
RM
Hicks
Juan José
JJ
D000284:Administration, Oral; D000328:Adult; D000975:Antioxidants / Q000008:administration & dosage / Q000378:metabolism* / Q000627:therapeutic use*; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects; D014810:Vitamin E / Q000008:administration & dosage / Q000627:therapeutic use*; D014815:Vitamins / Q000008:administration & dosage / Q000627:therapeutic use*
D000975:Antioxidants; D014815:Vitamins; D014810:Vitamin E; D008315:Malondialdehyde; D001205:Ascorbic Acid