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Table 1 Antioxidant action of ALA and DHLA upon reactive oxygen species and references

From: Alpha-lipoic acid as a pleiotropic compound with potential therapeutic use in diabetes and other chronic diseases

Reactive oxygen species ALA DHLA
Hydrogen peroxide Yes (12) Yes (12)
(H2O2) No (23) No (23)
Superoxide   
(O2-) No (23) Yes (12, 27,28)
  No (23)
Hydroxyl radical   
(HO-) Yes Yes
(23,24,27) (27)
SInglet oxygen Yes (12,29) Yes (29)
(O2 *)   No (24)
Peroxynitrite Yes (12,25) Yes 12,(25)
(ONOO-)
Nitric oxide radical Yes Yes (12)
(NO) (12, 26) No (26)
Hypochlous acid Yes (23, 24, 31) Yes (31)
(HOCL)
Peroxyl radical Yes (23) Yes (23, 30)
(HO2..) No (30)