Vitamin D Expert: The Fastest Way To Dementia & The Dangerous Lie You've Been Told About Sunlight!

The Diary Of A CEO with Steven Bartlett

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Thursday, 17 July 2025 - 2 hours 7 minutes

Is your daily routine ruining your health? Is THIS habit silently triggering dementia? 

Vitamin D Expert Dr. Roger Seheult 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. 

00:00 Intro

02:27 What Is Roger Aiming to Accomplish?

03:28 The 8 Pillars of Health

09:13 Story of Henry: A Fungal Lung Disease Patient

20:40 Why Our Mitochondria Need Sunlight

27:46 Sunlight and Viruses: Impact on COVID-19

30:00 Vitamin D and Lower Risk in COVID Patients

33:55 Benefits of Using Infrared Light Devices

47:50 Could More Sunlight Help You Live Longer?

51:20 Does the Sun Really Cause Melanoma?

54:37 Are Humans Meant to Live Outside?

57:31 Is It Worth Wearing an Infrared Light Mask?

59:31 How to Get Infrared Light on a Cloudy Day

01:08:14 Optimal Time of Day to Get Sunlight

01:09:34 Circadian Rhythm and Light Exposure

01:11:28 Benefits of SAD Light Therapy

01:13:02 Can Looking Through a Window Help Circadian Rhythm?

01:15:11 Why Should We Avoid Bright Screens at Night?

01:17:31 Should the Bedroom Be Completely Dark at Night?

01:19:23 Do Vitamin D Supplements Work?

01:21:14 Possible Consequences of Vitamin D Overdose

01:22:02 The Role of Vitamin D in the Body

01:24:00 Do Cravings Signal Nutrient Deficiencies?

01:25:35 Water’s Role in the Body

01:27:20 Interferons and the Innate Immune System

01:32:52 Importance of Hydration for Fighting Infections

01:34:35 Should We Use Hot and Cold Therapy Together?

01:36:10 Impact of Tree Aromas on Immunity

01:38:44 Do Indoor CO₂ Levels Matter?

01:39:30 How Can We Optimize Indoor Air Quality?

01:40:37 Faith as a Way to Deal With Stress and Anxiety

01:42:42 Conditional vs. Unconditional Forgiveness and Stress

01:45:55 Are People Who Believe in God Generally Healthier?

01:47:34 Roger’s Experience Witnessing Death

01:49:14 A Miraculous Story: Anoxic Brain Injury Recovery

01:59:17 Should Hospital Patients Be Taken Outside?

01:59:57 Are Melatonin Supplements Good for Sleep?

02:00:45 Side Effects of Melatonin Supplements

Follow Dr Roger:

Youtube - https://bit.ly/452IbrP 

X - https://bit.ly/3Udq5NA 

Instagram - https://bit.ly/3UgDLaA 

💡You can find out more about the light therapy lamp mentioned, here: https://amzn.to/4lXsUyc

💡You can find out more about the Aranet4 CO₂ meter mentioned, here: https://bit.ly/4lIvRmk 

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