Vitamin D Expert: The Fastest Way to Dementia & the Dangerous Lie You've Been Told About Sunlight! (Video)
Is your daily routine ruining your health? Is THIS habit silently triggering dementia?
In this 17 July 2025 video, host Steven Bartlett talks with vitamin D expert Dr. Roger Seheult who reveals how sunlight exposure, caffeine intake, and sleep can impact cancer risk, accelerate dementia, and fry your dopamine brain!
Dr. Roger Seheult is a world-leading doctor in internal medicine, lung health, critical care, and sleep medicine. As co-founder of MedCram, he’s helped millions understand how vitamin D, sunlight, mitochondria, and circadian rhythms impact disease, brain health, and longevity.
In this powerful interview, he explains:
- How just 2 minutes of morning sunlight can boost dopamine by 250%.
- The daily habit increasing your cancer risk (and how to fix it).
- What caffeine does to your sleep, hormones, and mental clarity.
- How red and infrared light boost your mitochondria.
- How sleep, light, and nutrition create a blueprint for longevity.
https://youtu.be/wQJlGHVmdrA
Timestamps:
00:00 Intro
02:12 What Is Roger Aiming to Accomplish?
03:13 The 8 Pillars of Health
08:58 Story of Henry: A Fungal Lung Disease Patient
20:25 Why Our Mitochondria Need Sunlight
27:31 Sunlight and Viruses: Impact on COVID-19
29:45 Vitamin D and Lower Risk in COVID Patients
33:40 Benefits of Using Infrared Light Devices
47:35 Could More Sunlight Help You Live Longer?
51:05 Does the Sun Really Cause Melanoma?
54:22 Are Humans Meant to Live Outside?
57:16 Is It Worth Wearing an Infrared Light Mask?
59:16 How to Get Infrared Light on a Cloudy Day
01:07:59 Optimal Time of Day to Get Sunlight
01:09:19 Circadian Rhythm and Light Exposure
01:11:13 Benefits of SAD Light Therapy
01:12:47 Can Looking Through a Window Help Circadian Rhythm?
01:14:56 Why Should We Avoid Bright Screens at Night?
01:17:16 Should the Bedroom Be Completely Dark at Night?
01:19:08 Do Vitamin D Supplements Work?
01:20:59 Possible Consequences of Vitamin D Overdose
01:21:47 The Role of Vitamin D in the Body
01:23:45 Do Cravings Signal Nutrient Deficiencies?
01:25:20 Water’s Role in the Body
01:27:05 Interferons and the Innate Immune System
01:32:37 Importance of Hydration for Fighting Infections
01:34:20 Should We Use Hot and Cold Therapy Together?
01:35:55 Impact of Tree Aromas on Immunity
01:38:29 Do Indoor CO₂ Levels Matter?
01:39:15 How Can We Optimize Indoor Air Quality?
01:40:22 Faith as a Way to Deal With Stress and Anxiety
01:42:27 Conditional vs. Unconditional Forgiveness and Stress
01:45:40 Are People Who Believe in God Generally Healthier?
01:47:19 Roger’s Experience Witnessing Death
01:48:59 A Miraculous Story: Anoxic Brain Injury Recovery
01:59:02 Should Hospital Patients Be Taken Outside?
01:59:42 Are Melatonin Supplements Good for Sleep?
02:00:30 Side Effects of Melatonin Supplements
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