Abstract This study provides an overview of free and bound amino acids, minerals and trace elements content in matcha including evaluation of their dietary intakes. The analyses employed IEC and ICP-MS methods. Theanine followed by Glu, GABA, Thr and Me were the most abundant free amino acids. Considering bound amino acids, Glu, Asp, Leu, Lys, Arg and Val were the most frequent. The amino acid score (AAS) for matcha (40.2 %) is comparable to the AAS for wheat and sunflower proteins. Ile and Thr were evaluated as limiting amino acids. Regarding recommended daily allowance (RDA), the contributions of Cys and Met were up to 8%. Matcha is contributor to Adequate Intake (AI) or RDA for males in the following order: Mn (up to 15 %) > Cu > Fe (up to 7%). Similarly, for females, matcha contributes to RDA or AI values in this order: Mn (up to 19 %) > Cu > Zn (up to 5%). It has not been proved that matcha is a significant source of Se and Cr. A daily serving portion of 5 g does not contribute to PTWI (Provisional tolerable weekly intake) and PTMI (Provisional tolerable monthly intake) for Al, Sn, Cd and Hg.

中文翻译：

---

抹茶 (Camellia sinensis L.) 中游离和结合的氨基酸、矿物质和微量元素：营养评估

摘要 本研究概述了抹茶中游离和结合氨基酸、矿物质和微量元素的含量，包括评估其膳食摄入量。分析采用 IEC 和 ICP-MS 方法。茶氨酸其次是 Glu、GABA、Thr 和 Me 是最丰富的游离氨基酸。考虑到结合氨基酸，Glu、Asp、Leu、Lys、Arg 和 Val 是最常见的。抹茶的氨基酸评分 (AAS) (40.2%) 与小麦和向日葵蛋白质的 AAS 相当。Ile 和 Thr 被评估为限制性氨基酸。在推荐每日津贴（RDA）方面，Cys 和 Met 的贡献高达 8%。抹茶按以下顺序为男性提供充足的摄入量 (AI) 或 RDA：Mn（最多 15%）> Cu > Fe（最多 7%）。同样，对于女性，抹茶按以下顺序对 RDA 或 AI 值做出贡献：Mn（最高 19%）> Cu > Zn（最高 5%）。尚未证明抹茶是硒和铬的重要来源。每天 5 克的份量对 Al、Sn、Cd 和 Hg 的 PTWI（临时可耐受每周摄入量）和 PTMI（临时可耐受每月摄入量）没有影响。