Hydrophilic and lipophilic antioxidant capacities of commercial dietary antioxidant supplements
2007
Garrido, Ignacio | Bartolomé, Begoña | Gómez-Cordovés, Carmen
The ORAC (oxygen radical absorbance capacity) assay was applied to the hydrophilic (H) and lipophilic (L) fractions of 17 commercial dietary antioxidant supplements. The total ORAC (H-ORAC + L-ORAC) values varied from 0.22 to 8.26 μmol of Trolox equivalents per mg of supplement, demonstrating a great variability among them. Hydrophilic antioxidants are the main portion (86.3-99.3% of the total ORAC value) of the supplements, in comparison to the lipophilic fraction (0.7-13.7%). The daily total antioxidant intake provided by the supplements is reported.
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