Theanine is a new kind of natural food additives and a peculiar amino acid in tea.

酸是一种新型天然的食品添加剂，是茶叶中的特有氨基酸。

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Yup, just like yogurt and cheese, microbes can also make our amino acid additives.

FORBES: 6 Disgusting Things You're Eating (And You Don't Even Know It!)

He says there is little evidence backing other popular energy additives, including the amino acid taurine in Red Bull.

FORBES: Magazine Article