It has been almost a year since United States Department of Agriculture took down its ORAC database. Now that this official reference point is gone, does this measure of antioxidant potential still have relevance in the marketplace?
South African herbal extracts specialist Green Cell Technologies (GCT) has defended the antioxidant measures that showed its green and rooibos tea extracts could deliver ORAC values of around 1,700,000 per 100g.
Single measurements for total antioxidant values in foods and beverages do not provide an effective means of comparison, whilst differences in measuring protocols require standardisation, say researchers.
In the third part of our series on antioxidants, NutraIngredients talks to Jeff Blumberg, professor of antioxidants at Tuft University, and finds out why we need differentiation in the antioxidant field.
Not all fruit antioxidants behave the same according to a recent
study conducted by USDA researchers, information that reinforces
the need for further research into how antioxidants perform in