International journal of food sciences and nutrition
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Int J Food Sci Nutr · Mar 2012
ReviewIncreasing the antioxidant content of food: a personal view on whether this is possible or desirable.
A commonly held belief is that higher intake of antioxidants will promote better health through enhanced antioxidant status and lowered oxidative stress. However, the benefits of antioxidant-rich foods have not been reproduced in supplementation trials with pure antioxidants. This has driven research and commercial interest in foods, including traditional foods and their components, with enhanced antioxidant content and improved antioxidant bioavailability, which in many cases is very low. In this paper, evidence for the health benefits of antioxidant-rich foods and methods to increase the antioxidant content and bioavailability of food antioxidants are reviewed briefly, and the concept that increased food antioxidant content/intake per se is beneficial is examined from a cautionary perspective, considering issues of low bioavailability, rapid catabolism, biotransformation and the paradoxical pro-oxidant effects of dietary antioxidants.
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The European Food Safety Authority (EFSA) has recently highlighted the need to provide scientific requirements for health claims and to find new regulatory issues for healthy food products. For this reason, EFSA asked its Dietetic Products, Nutrition and Allergies (NDA) panel to draft additional guidelines on scientific assessment of these claims. ⋯ The new system was not only a necessary support for consumers to make the correct choice of products, but rather a way for EFSA to demonstrate transparency of this new approach. This was the field of the pharmaceutical industry, this new regulation is, therefore, also for EFSA, an expensive learning process.