在不同的生产条件下,评估铁的生物可访问性和在微藻中进行生物积累丰富
Fengzheng Gao1, Nina Lamprecht2, Ute Stern2
1Sustainable Food Processing Laboratory, Institute of Food Nutrition and Health, ETH Zurich, Zurich 8092, Switzerland; Laboratory of Nutrition and Metabolic Epigenetics, Institute of Food, Nutrition and Health, ETH Zurich, Schwerzenbach 8603, Switzerland.
Bioresource technology
|October 29, 2025
概括
微藻类显示出高铁积累和可访问性,为缺铁性贫血提供了可持续的解决方案. 这项研究探讨了不同微藻物种和种植方法的铁含量和吸收.
科学领域:
- 生物技术与可持续资源
- 营养科学与公共卫生
背景情况:
- 缺铁性贫血影响全球数十亿人,需要创新的饮食解决方案.
- 微藻因其营养价值和可持续性而闻名,但需要进一步研究铁的生物可用性.
- 关于微藻来源的铁的生物可访问性和生物积累的研究有限.
研究的目的:
- 为了评估铁的生物积累和生物可访问性在三种微藻类:Arthrospira platensis,硫菌,和Chlorella vulgaris.
- 为了比较这些因素在自营,异营和混合营养的种植条件.
- 研究富含铁介质对铁含量和生物可用性的影响.
主要方法:
- 在标准和富含铁的介质下种植A. platensis,G. sulphuraria和C. vulgaris.
- 评估铁的生物积累 (mg/kg生物质) 和生物可访问性 (%) 在自营,异营和混合营养条件下.
- 在培养基中对不同铁度的反应中分析铁含量和生物可用性.
主要成果:
- 自营养殖为A. platensis (563.4毫克/公斤) 和C. vulgaris (326.5毫克/公斤) 产生了最高的铁生物积累;在混合养殖条件下G. sulphuraria达到峰值 (238.9毫克/公斤).
- 与自食培养 (18.4%-41.8%) 相比,异质培养显著改善了铁的生物可访问性 (66.9%对于G. sulphuraria,76.3%对于C. vulgaris).
- 介质中铁的增加增强了生物积累 (G. sulphuraria高达1472.4 mg/kg),但降低了生物可访问性 (从36.8%降至17.1%). 在自营养成长的G. sulphuraria.中观察到最大的绝对生物可访问铁 (251.6 mg/kg).
结论:
- 微藻种类显示出作为铁源的巨大潜力,培养方法和铁丰富影响积累和可访问性.
- 异质培养增强了铁的生物可访问性,而铁丰富促进了生物积累,尽管可能以相对生物可访问性为代价.
- 微藻,特别是硫藻 (G. sulphuraria),提供一种高度生物可访问和缩的铁来源,超过了传统食品,并提出了对抗缺铁性贫血的可行策略.
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