# References

1. Monograph. Withania somnifera. Altern Med Rev. 2004;9(2):211-4.  
   PMID:15253680  
   [Reference](https://pubmed.ncbi.nlm.nih.gov/15253680/)

2. 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.  
   [Reference](https://sohonootropics.com/wp-content/uploads/2020/01/A-Standardized-Withania-Somnifera-Extract-Significantly-Reduces-Stress-Related-Parameters-in-Chronically-Stressed-Humans-NXPowerLite-Copy.pdf)

3. 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.  
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4. Hidese S, Ogawa S, Ota M, et 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  
   [Reference](https://pubmed.ncbi.nlm.nih.gov/31623400/)