This study investigated the effects of L-Theanine and Hericium Erinaceus gummies. Its aim was to assess the impact of these supplements on psychological state, cognitive functions, and sleep quality. The research focused on university students. Specifically, conditions such as psychological stress, anxiety, and depression were examined. Furthermore, participants' sleep quality and overall cognitive performance were evaluated. The intervention involved administering the mentioned dietary supplements in the form of gummies. The study was sponsored by the University of Nottingham Malaysia and has already been completed.