Journal
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
Volume 43, Issue 12, Pages 2123-2129Publisher
WILEY
DOI: 10.1111/j.1365-2621.2008.01854.x
Keywords
Antioxidant capacity; cytoprotection; ferric reducing antioxidant power; functional foods; oxidative stress; oxygen radical absorbance capacity; phenolic content
Categories
Funding
- Foundation for Research, Science and Technology, New Zealand
- Wellness Foods Programme [C06X0405]
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Developing functional food products requires a structured approach for screening potential ingredients. Using the development of a product with antioxidant properties as a model, eight fruit juice concentrates were screened, including New Zealand fruits. The total phenolic content and the antioxidant capacity, using chemical-based assays (ferric reducing antioxidant power and oxygen radical absorbance capacity assays), were determined. The potential to protect against oxidative stress in Jurkat cells was also determined. Results indicate that the total phenolic content and antioxidant capacity in chemical-based assays were strongly correlated. However, the total phenolic content did not dictate the level of protection from oxidative stress in this cell-based model, suggesting that the type of phenolic compounds present and interactions between them may be important, although the activity of other compounds, such as vitamin C or carotenoids, may also be implicated. This model for screening ingredients may be used to design synergistic combinations of ingredients, and results may provide supportive evidence in the development of functional foods for this and other health targets.
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