Nonnutrient antioxidants

A number of other compounds that are not nutrients but are formed in the body as normal metabolites also provide protection against radical damage. Such compounds include uric acid (the end-product of the metabolism of the purines) and the coenzyme ubiquinone (section The latter is sometimes marketed as vitamin Q, but it can be synthesized in the body, and there is no evidence that it is a dietary essential or that an increase above the amount that is normally present in tissues confers any benefit.

In addition to these protective nutrients and normal metabolites, a wide variety of compounds that are naturally present in plant foods also have antioxidant action. These are mainly polyphenols, which are capable of forming stable radicals that persist long enough to undergo reaction to non-radical products. However, they are also potentially capable of undergoing non-enzymic redox cycling, leading to increased formation of oxygen radicals.

Keep Your Weight In Check During The Holidays

Keep Your Weight In Check During The Holidays

A time for giving and receiving, getting closer with the ones we love and marking the end of another year and all the eating also. We eat because the food is yummy and plentiful but we don't usually count calories at this time of year. This book will help you do just this.

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