问HN：你们用什么方法保持专注而不出现咖啡因引起的紧张？
我一直在与咖啡引起的焦虑和下午的疲惫作斗争。尝试过抹茶（准备过程太繁琐）和蘑菇咖啡（消化问题）。最近发现普洱茶的L-茶氨酸与咖啡因的比例更适合保持冷静的专注。
我正在探索是否有需求推出一种方便的普洱浓缩液，并制作了一个简短的调查（2-3分钟）：https://aicofounder.com/research/ElEORiN
想知道HN社区中，尤其是那些进行深度工作的朋友们，是否已经远离传统咖啡，使用了什么有效的方法？
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I've been struggling with coffee-induced anxiety and afternoon crashes. Tried matcha (too much prep) and mushroom coffee (digestive issues). Recently discovered puer tea has a better L-theanine:caffeine ratio for calm focus.<p>I'm exploring whether there's demand for a convenient puer concentrate and put together a quick survey (2-3 min): https://aicofounder.com/research/ElEORiN<p>Curious what's working for the HN crowd—especially folks doing deep work who've moved away from traditional coffee?