This episode I explain how we sense chemicals by way of smell, taste and pheromones. How things smell and taste and bodily chemicals of others have a profound effect on how we feel, what we do and our hormones. I explain the 3 types of responses to smell, the 5 types of tastes, the possible existence of sixth taste sense. I explain how smell and taste reflect brain health and can be used to assess and even promote brain regeneration. Both basic science and protocols are described including how to make sour things taste sweet and how to develop a heightened sense of smell and taste. Thank you to our sponsors: ROKA - https://www.roka.com - code: huberman InsideTracker - https://www.insidetracker.com/huberman Athletic Greens - https://www.athleticgreens.com/huberman Our Patreon page: https://www.patreon.com/andrewhuberman Supplements from Thorne: http://www.thorne.com/u/huberman Social: Instagram - https://www.instagram.com/hubermanlab Twitter - https://twitter.com/hubermanlab Facebook - https://www.facebook.com/hubermanlab Website: https://hubermanlab.com Links: 1. What Is Color? By Arielle & Joann Eckstut https://www.amazon.com/What-Color-Questions-Answers-Science/dp/1419734512 2. The smell of tears lowers testosterone DOI: 10.1126/science.1198331 3. Inhaling (sniffing) improves non olfactory attention & cognition: https://pubmed.ncbi.nlm.nih.gov/31089297/ 4. Smelling Salts & Improved Athletic Performance https://pubmed.ncbi.nlm.nih.gov/28922211/ 5. Taste Receptors Are Expressed By Ovaries & Testes doi:10.1093/molehr/gat009 Please note that The Huberman Lab Podcast is distinct from Dr. Huberman's teaching and research roles at Stanford University School of Medicine. The information provided in this show is not medical advice, nor should it be taken or applied as a replacement for medical advice. The Huberman Lab Podcast, its employees, guests and affiliates assume no liability for the application of the information discussed. Photo Credit: Mike Blabac - https://www.blabacphoto.com