White Tea, especially White Hair Silver Needle, has high contents of free amino acids and active antioxidants with catechin in its Tea Polyphenols. 白茶,特别是白毫银针,富含多种氨基酸和抗氧化剂-多酚中的儿茶素。
catechin
[ noun ] a tannic acid that is extracted from black catechu as a white crystalline substance <noun.substance>
Catechin \Cat"e*chin\, n. (Chem.) One of the tannic acids ({C15H14O6}), extracted from {catechu} as a white, crystalline substance; -- called also {catechuic acid}, {catechinic acid}, {cyanidol}, and {catechuin}. It is a flavonoid found generally in higher woody plants, and is used in dyeing and tanning. [1913 Webster +PJC]