Ashwagandha is able to enhance the quality of sleep (Feb 16, 2017) https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0172508 Ashwagandha can help regulate cortisol levels (stress hormone) and has a calming effect on the nervous system, which can help relieve stress + insomnia (March 30, 2017) https://medicalxpress.com/news/2017-03-key-component-sleep-inducing-herb.html