期刊
BEVERAGES
卷 4, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/beverages4020033
关键词
preservatives; sodium benzoate; potassium sorbate; hippuric acid; benzene; urea cycle disorder therapy; cognitive functioning; hypoglycinemia
Sodium benzoate (E211) and potassium sorbate (E202) have long been used for large-scale beverage preservation, yet it is potassium sorbate that is now the preferred option for most soft drink manufacturers. Partly this is a reaction to the discovery that benzoate can cause drinks to contain traces of the carcinogen benzene. This benzene is thought to have its origins in a free-radical catalysed reaction of the benzoate with ascorbic acid. However, there may be additional benefits to using potassium sorbate rather than the benzoate preservatives in beverages. In children, a high dietary intake of sodium benzoate may be associated with asthma, allergy, or attention deficit-hyperactivity disorder. Benzoate is now known to influence cognitive functioning. By acting as a competitive inhibitor of the enzyme D-amino acid oxidase (DAAO), thereby reducing the DAAO-catalysed degradation of D-serine, it can upregulate the activity of the N-methyl-D-aspartate receptors in the brain. A high benzoate intake might also generate glycine deficiency, lack of glycine generally exerting a negative impact on brain neurochemistry. There are therefore strong grounds for suspecting that dietary benzoate can have neuromodulatory (mood, learning, and personality) effects and influence child hyperactivity disorders.
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