Table 2

Reactive species scavenged by ascorbic acid

Chemical species

Reaction rate (M-1s-1)


Reactive oxygen species

Hydroxyl radical

1.1 × 1010

Alkoxyl radical

1.6 × 109

Peroxy radical

1.2 × 106

Superoxide anion/ hydroperoxy radical

1.0 × 105

Reactive nitrogen species

Dinitrogen trioxide/dinitrogen tetroxide

1.2 × 109

Peroxynitrite/peroxynitrous acid

235

Antioxidant derived radicals

Alpha-tocopherol radical

2 × 105

Urate radical

1 × 106

Thiyl/sulphenyl radical

6 × 108


Adapted from Carr and Frei [15]

Naidu Nutrition Journal 2003 2:7   doi:10.1186/1475-2891-2-7

Open Data