http://vvedndyt433kopnhv6vejxnut54y5752vpxshjaqmj7ftwiu6quiv2ad.onion/wiki/L-Theanine
Bioscience, Biotechnology, and Biochemistry . 62 (4): 816–817. doi : 10.1271/bbb.62.816 . ISSN 0916-8451 . ↑ Park, S.-K., Jung, I.-C., Lee, W. K., Lee, Y. S., Park, H. K., Go, H. J., Kim, K., Lim, N. K., Hong, J. T., Ly, S. Y., Rho, S. S. (April 2011). "A combination of green tea extract and l-theanine improves memory and attention in subjects with mild cognitive impairment: a double-blind placebo-controlled study".