汁中的 Askorbic 酸的生物利用性
JAMA
|June 14, 1976
概括
消毒显著增加汁中非活性 Askorbic 酸,同时减少活性形式. 这影响了营养的生物可用性,突出了加工果汁质量的变化.
科学领域:
- 营养生物化学 营养生物化学
- 食品科学与技术 食品科学与技术
- 分析化学 分析化学
背景情况:
- 亚酸 (维生素C) 对人类健康至关重要,其生物可用性可能会受到食品加工的影响.
- 汁是酸的常见来源,但像巴氏杀菌这样的加工方法可能会改变其成分.
- 了解 Askorbic 酸的形式及其在加工饮料中的稳定性对于营养评估至关重要.
研究的目的:
- 量化和比较新鲜和巴氏化汁中的生物活性和非活性 Askorbic 酸衍生物.
- 评估巴氏杀菌对汁中 Askorbic 酸生物可用性的影响.
- 调查商业制备的汁产品中酸衍生物的变异性.
主要方法:
- 在各种汁制剂中分析L-酸,脱-L-酸和2,3-二-L-酸.
- 使用分析化学技术量化测量活性和非活性 Askorbic 酸形式.
- 新鲜和巴氏化汁样品之间的比较分析.
主要成果:
- 新鲜的汁含有4-7毫克/100毫升的非活性 Askorbic 酸.
- 与新鲜果汁相比,巴氏化汁呈现出明显更高水平的非活性 Askorbic 酸 (15-30 毫克/100 毫升),增加了多达 400%.
- 新鲜的汁含有高达100%的活性 Askorbic 酸比巴氏杀菌样品,表明加工果汁的生物利用率降低.
结论:
- 消毒剂显著增加了汁中不活跃的 Askorbic 酸衍生物.
- 处理导致汁中活性 Askorbic 酸 (维生素 C) 的生物可用性大幅下降.
- 在不同制成的汁产品中,酸含量和生物可用性存在显著的变化.
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