Chinese green teas with theanine?

[Groucho]

It's my understanding that the highest levels of theanine in green teas comes from being shade grown. I've read that, among Chinese green teas, Lu Shan Yun Wu is one of the ones that I'd write high in theanine. Is this true? Are there any other Chinese green teas that are as high or higher (on average) than LSYW?

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[Groucho]

I just read that the higher quality Long Jing have a high level of theanine, too.

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[beforewisdom]

So much about tea is lore. Has anyone ever analysed these teas in labs and come up with metrics for theanine content?

[daidokorocha]

Not sure if they have, but in Japan a new water was released spiked with theanine for bedtime.

[beforewisdom]

You can go to any health food store and find theanine capsules. Be careful, they are very strong.

[Drax]

So much about tea is lore. Has anyone ever analysed these teas in labs and come up with metrics for theanine content?

Yes, but the real question is how consistent are the levels from bush to bush, let alone year to year? Many factors influence how plants grow and product such chemicals.

[Groucho]

I thought the level of theanine is higher among the shade grown teas. While there's variations due to a plethora of other influences, I thought that those teas grown in the shade were some of the more rich in theanine.

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[Mureke]

I haven't seen a Japanese-Chinese comparison, but high grades tend to have double the theanine content of lower grade tea.

Apparently, it's not only shading that tends to result in a high theanine content, but also low temperature. Both shade and coldness lead to high amino acids in relation to polyphenols.

I checked some papers for this thread: http://www.teachat.com/viewtopic.php?f=6&t=19307