In this Huberman Lab Essentials episode, I answer your most frequently asked questions about science-backed tools for improving alertness, enhancing learning, and achieving quality sleep. I also discuss the optimal times for exercising and eating, how to properly time light exposure, as well as methods for strategically adjusting your body temperature to influence your nervous system. Huberman Lab Essentials are short episodes (approximately 30 minutes) focused on essential science and protocol takeaways from past Huberman Lab episodes. Essentials will be released every Thursday, and our full-length episodes will still be released every Monday. Read the full show notes for this episode at hubermanlab.com. Thank you to our sponsors AG1: https://drinkag1.com/huberman LMNT: https://drinklmnt.com/huberman Eight Sleep: https://eightsleep.com/huberman David: https://davidprotein.com/huberman Timestamps 00:00:00 Introduction to Huberman Lab Essentials 00:00:37 Understanding Circadian Rhythms & Light 00:02:17 Impact of Red Light on Circadian Rhythms 00:03:12 Light Through Windows & Circadian Clocks 00:05:04 Seasonal Changes & Circadian Rhythms 00:07:38 Neurotransmitters & Mood Regulation 00:09:00 Sponsors: LMNT & Eight Sleep 00:11:47 Exercise & Circadian Rhythms 00:14:40 Neuroplasticity & Learning 00:20:16 Sponsor: AG1 00:21:49 Non-Sleep Deep Rest (NSDR) & Learning 00:23:43 Nootropics & Cognitive Enhancement 00:26:16 Temperature & Circadian Rhythms 00:31:25 Sponsor: David 00:32:41 Food, Neurotransmitters & Circadian Rhythms 00:35:28 Self-Experimentation & Conclusion Disclaimer & Disclosures