There are a few clips that may be relevant to your search for sleepiness. In episode 2, I discuss how our sleep and wake cycle is governed by a circadian rhythm, which is controlled by a clock in our brain. Understanding this relationship between light and sleep is crucial for better sleep hygiene. In episode 101, I explain how theanine can enhance the quality, depth, and duration of sleep, which may help reduce sleepiness during the day. Finally, in the guest series episode with Dr. Andy Galpin, we discuss how improving the quality and duration of sleep can indirectly improve performance, which may help with daytime sleepiness.