![]() ![]() One hint that a tea may be high in l-theanine is if it has a distinct umami-like flavor. Without access to precise scientific tools, it can be difficult to accurately measure the l-theanine content in a particular tea. Harvest time - Teas that are harvested early in the spring, including first flush teas and silver needle teas, tend to be higher in l-theanine. However, research concerning the effect of tea processing methods on l-theanine levels is still ongoing, with some studies demonstrating conflicting evidence. This includes minimally processed green teas and white teas. Processing methods - L-theanine may be better-preserved in teas that undergo minimal processing. The shading process induces a stress response in the tea plant, resulting in elevated levels of l-theanine, caffeine, and other beneficial properties. This includes shaded full leaf teas like Gyokuro and Kabusecha as well as Matcha, which is a form of powdered shade-grown green tea. Growing practices - Shade-grown Japanese teas tend to be especially high in l-theanine. Factors that can influence the l-theanine content in tea include: While l-theanine is present in all loose leaf tea made from the camellia sinensis plant, certain teas like matcha, shade-grown green teas, and first flush teas contain particularly high levels of l-theanine. This savory-sweet characteristic gives tea a rich depth of flavor in addition to its unique health benefits. Instead, the l-theanine present in tea provides a soothing, calming effect without making you feel sleepy! L-Theanine in TeaĪside from its potent stress-reducing effects, l-theanine is also responsible for the umami taste in tea. Unlike compounds with similar properties, l-theanine doesn’t contribute to drowsiness or a lack of alertness. L-theanine also stimulates a related neurotransmitter called GABA, which produces its own calming, anxiety-reducing effects. L-theanine works by blocking excitatory neurotransmitters like glutamate, resulting in feelings of calm and relaxation. Studies show that l-theanine can help to reduce feelings of stress and anxiety.
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