Millions of people are living with unexplained symptoms like allergies, brain fog, anxiety, and chronic fatigue without realizing the hidden cause: mast cells gone rogue. In this episode of The Human Upgrade, Host Dave Asprey sits down with leading functional medicine physician Dr. Tania Dempsey to uncover how Mast Cell Activation Syndrome (MCAS) drives inflammation, disrupts mitochondria, and sabotages metabolism—and what you can do to switch it off. Watch this episode on YouTube for the full video experience: https://www.youtube.com/@DaveAspreyBPR Dr. Dempsey is internationally recognized for her work in functional medicine, biohacking, and chronic illness. She co-founded the AIM Center for Personalized Medicine, has published groundbreaking research on MCAS with Dr. Lawrence Afrin, and treats some of the most complex cases of immune dysregulation, autoimmune disease, and environmental illness. Her expertise helps you understand why mast cells are the missing link in allergies, long COVID, Lyme, mold toxicity, and even hormone disruption—and how to reclaim control of your biology. Dave and Dr. Dempsey break down how mast cells interact with mitochondria, hormones, and the nervous system, showing how chronic inflammation accelerates aging and blocks human performance. You’ll discover why biohacking tools like fasting, ketosis, supplements, red light, cold therapy, sleep optimization, and smarter not harder lifestyle strategies all influence mast cell stability. They also explore why brain optimization, neuroplasticity, and nootropics are essential for calming inflammatory cascades, and how functional medicine provides practical solutions beyond conventional treatment. You’ll Learn: • Why mast cells are the hidden switch behind allergies, chronic inflammation, and brain fog • How mitochondria and mast cells work together to drive human performance—or disease • The connection between toxic mold, Lyme, long COVID, hormone imbalance, and MCAS • How supplements, fasting, ketosis, and cold therapy stabilize mast cells and boost longevity • Why functional medicine and biohacking are essential for complex chronic illness • How mast cells impact metabolism, sleep optimization, and neuroplasticity • The surprising link between mast cells, anxiety, and mental health symptoms This episode is essential for anyone serious about hacking inflammation, protecting longevity, upgrading metabolism, and achieving high performance with resilience and clarity. Dave Asprey is a four-time New York Times bestselling author, founder of Bulletproof Coffee, and the father of biohacking. With over 1,000 interviews and 1 million monthly listeners, The Human Upgrade is the top podcast for people who want to take control of their biology, extend their longevity, and optimize every system in the body and mind. Each episode features cutting-edge insights in health, performance, neuroscience, supplements, nutrition, hacking, emotional intelligence, and conscious living. Episodes are released every Tuesday, Thursday, and Friday (audio-only) where Dave asks the questions no one else dares, and brings you real tools to become more resilient, aware, and high performing. Keywords: mast cell activation syndrome, MCAS, chronic inflammation, mitochondria dysfunction, histamine intolerance, functional medicine, biohacking, allergies, brain fog, long covid, mold toxicity, Bartonella, Lyme co-infections, oxalates, salicylates, mast cell stabilizers, immune dysregulation, neuroinflammation, chronic fatigue syndrome, autoimmune triggers, personalized medicine, longevity supplements Thank you to our sponsors!Leela Quantum Tech | Head to https://leelaq.com/DAVE for 10% off.LMNT | Free LMNT Sample Pack with any drink mix purchase by going to https://drinklmnt.com/DAVE.Resources: • Tania’s Website: https://drtaniadempsey.com/ • Danger Coffee: https://dangercoffee.com/DAVE15 • Dave Asprey’s BEYOND Conference: https://beyondconference.com • Dave Asprey’s New Book – Heavily Meditated: https://daveasprey.com/heavily-meditated • Upgrade Collective: https://www.ourupgradecollective.com • Upgrade Labs: https://upgradelabs.com • 40 Years of Zen: https://40yearsofzen.com Timestamps: 00:00 — Trailer 01:10 — Introduction 03:27 — Why So Sick Today? 05:57 — MCAS Explained 08:33 — Mold & Environment 11:36 — Spotting MCAS 13:43 — Personal Stories 15:15 — Research & Biohacking 16:35 — Managing Triggers 20:15 — Gut & Stomach Acid 22:42 — Reaction Timing 25:30 — Hormones & MCAS 28:39 — Thyroid & Mitochondria 32:28 — Chronic Illness Navigation 40:06 — Insurance Battles 44:44 — Cholesterol & Ethics 49:11 — Personalized Care 53:24 — Circadian & Stress 58:24 — Testing Approaches 01:01:35 — Collagen & Joints 01:04:34 — MMPs & Aging 01:09:12 — Access & Experimentation 01:13:14 — MCAS & Mental Health 01:17:46 — Benzos & Stigma 01:20:23 — Vaccines & Spike Protein 01:25:18 — Research & Treatments 01:26:12 — Nicotine & Focus 01:29:24 — Closing See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.
What You’ll Learn in This Episode: • How “zombie cells” (senescent cells) sabotage your hair from the inside out • The science behind the OS-01 peptide and how it reverses visible hair thinning • Why thinning hair isn’t just genetic—and what else is driving it • How stress, hormones, and aging collide to trigger follicle dysfunction • What your scalp microbiome has to do with regrowth and hair density • How to stack red light, peptides, and topicals for real, measurable results.
Excellent points on the veganism debate. I only wish vegans were open to facts when discussing these things.
Hey Dave. Tell Tracy that his book is probably being shadow banned in Amazon. When you search for, it auto corrects to "Tracy Chapin" every time so it not something random. It shows something completly unrelated. Maybe his lawyers should look into this.
David Goggins does not approve of this program.
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great podcast, thank you very much 😄
In the development of cybersecurity of satellite European systems, an important stage is regularly tested https://orbitaltoday.com/2023/04/26/satellite-hackers-seize-control-of-esa-satellite/ What disadvantages in modern satellites can be useful to spies and enemy hackers?
If you are looking to burn calories then less time equals less calories. So if that's your goal then this wouldn't be beneficial, correct?
Hi Dave, You mentioned in this podcast that you do NOT recommend psyllium as prebiotic fiber - at the same time on other podcasts you're promoting uprisingfood.com which has psyllium as one of their main ingredients. I'm a bit confused. Could you please help me to clarify this? Should I avoid uprisingfood.com products as they have psyllium in it? Thx.
I'm just wondering: if the infrared sauna heats the person up from the inside: 1. Then Why does a "cabin" needed to be built around it, why cannot it be just a wall panel, like the JOOVV 3.0 Red Light Therapy devices? 2. And if the "cabin" is indeed needless for the infrared Sauna, then why JOOVV or SUNLIGHTEN - or any other similar company don't build a device /wall panel which offers 2 in 1: both Red Light Therapy AND infrared sauna in one single device / single session? Would this be too difficult/expensive to build? Or would there be health risks to have infrared sauna and red light therapy session together, at the same time?
re: low T as a function of training intensity and recovery Highly recommend mark sisson's book primal endurance. Brad Kearns case presented in that book is right in line with this guy's experience.
watch soft white underbelly. tell them and the host of that show what you said in the peer's podcast about therapy. give them money to better their lives since you don't think they need some help. really disappointed in you Dave. you let me down. I will no longer praise you.
what you said about the therapy is so wrong and proves you are an not really a sufferer like you say. I followed you for years...years... not now. you have no idea what me and others have been through. You were fat and picked on, but what about a full trauma childhood, leaving you really mentally crippled. I liked you but now not so sure. you think anyone that had a awful upbringing or horrible experience can do it themselves. slight insult.
what you just said about the therapy is so wrong and proves you are an idiot. I followed you for yers...years... I am out. you have no idea what me and others have been through. wow. you are not in touch. thank you for showing me what type of person you are. I liked you but now no. you think anyone that had a awful upbringing or horrible experience can eR a carrot or spend your kind of money sitting in a tube of water and they get better. shame on you. someone last week said terrible things about you but I defended you but now what you Saud in the episode is an total insult.
really enjoyed this one. it continues to amaze me how otherwise intelligent well-informed people like the guest can remain so ignorant about this virus and the vaccine. I.e I e. overestimating the risk and uninformed about how useless and dangerous the vax has proven to be. not to mention completely uninformed about a middle or alternate path to addressing the public health issue. heaven forbid public health officials should encourage testing for vitamin d, inflammation and blood sugar regulation. or that they would advocate supplementation and holistic approaches to preparing oneself to win against the virus. heaven forbid they should advocate prophylactic treatment for those at high risk of exposure or infection. no way should this intelligent individual advocate for prophylactic use of proven effective early treatments
this is the first time someone has explained why memory palaces are useful in our day and age. time to clean off the vines.
That is so ualll conversation, i have a teen doughter, She had anorexia and i was trying teach her to make peace whit food with high fat diet is good for the brain and she used to feel less hunger less stressed . Learn with Dr Daniel Amen and i thought that was the best for her.. When she was at psychiatric clinic, they criticize my method i was begging for them not to give her white bread and sugary food becouse she gets into stress becouse od the craving, she also wants too, she keeping saying that she want to do fat diet and fell better this way, they dinied gave to her white flour and sugar and its not good for any those kids, They used every Tuesday teachs kids how to do candys and cakes... They didint exercised and sun shower only thru the window I was lost.. Sad.. puting my kid in sharks mouth.. Was in the best lisbon hospital at Portugal.. We are so far away.. Thank god that i found you and Peter Attia, Jason Fung Mark Hyman, Ben Bikman... 🙏
So precious.. Thanks 🙏💪
So interesting and nice topic, and very fun becouse last February I had 7 day fast on the beginning of the month and i also had 2 times 48 hours in the end of the month I did 5 day fast total I did 15 days without food i lost 5 kilos, and my period 😕 then I realize that I went to far.. Damm I felt so good.. So hard to me to lose weight, and my inflammation was not there anymore, Rsrsrs thanks one more time Dave 🙏