Auddy B, Hazra J, Mitra A, Abedon B, Ghosal S. A standardized Withania Somnifera
extract significantly reduces stress-related parameters in chronically stressed
humans: A double-blind, randomized, placebo-controlled study. J
Am Nutra Assoc. 2008;11:50-56.
Nobre AC, Rao A, Owen GN. L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pac J Clin Nutr. 2008;17(1):167-8.
doi: 10.6133/apjcn.2008.17.s1.40
Hidese S, Ogawa S, Ota M, er al. Effects of L-Theanine
administration on stress-related symptoms and cognitive functions in
healthy adults: a randomized controlled trial. Nutrients. 2019;11(10):2362.
doi: 10.3390/nu11102362