[sheefrex]

That has a lot more L-theanine, but even then seems very variable so could be the same or way off.

For example, in one study "the final dose of 1 gram of Matcha green tea was taken on the testing day and contained only 12.4 mg of L- theanine." Source: https://www.ffhdj.com/index.php/DietarySupplementsNutraceuti...

Another study: "According to Kaneko et al., the content of l-theanine in matcha tea infusions amounts to 6.1 mg/L [50], while Unno et al. [9] found as much as 44.65 mg/g of that compound in matcha tea samples." Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7796401/

I'm not sure, but I guess one would use around 4 grams of matcha in a cup? So then at the upper bound you would come close to 200mg. But matcha has a lot of caffeine so probably not suitable to improve sleep.