The Dr. Tyna Show
The Dr. Tyna Show
Dr. Tyna Moore
The Truth About Sunlight Deficiency | Jonathan Jarecki
1 hour 16 minutes Posted Jun 18, 2026 at 7:00 am.
Introduction 
Jonathan’s Background 
People Photosynthesize 
Sunlight + Metabolic Health 
CGM Research 
Sunlight Comes First 
LED Light Risks 
Light Deficiency + Modern Disease
Incandescent vs. LED Lighting
Circadian Rhythms + Natural Light
Sun Exposure, Skin Cancer + Longevity
Melanoma Myths + UV Exposure
Sunlight, Mortality + Cardiovascular Health
The Risk vs. Benefit of Sun Exposure
Nitric Oxide, Blood Pressure + UV Light
Why Humans Are Addicted to the Sun
Sunlight, Vitality + the Blue Zones
Morning Sunlight + Cortisol Regulation
Cold Exposure + Circadian Health
Jonathan's Cortisol Experiment
Breathwork, Stress Resilience + Mindset
Where to Find Jonathan
Outro
0:00
1:16:18
Download MP3
Show notes
EP. 267: Join my NEW community for Gen X women: ⁠https://www.skool.com/drtyna/about⁠
We’ve been told for decades to stay out of the sun, wear more sunscreen, and avoid UV exposure at all costs. But what if we got the story wrong?
In this episode, I sit down with Jonathan Jarecki, a biology student and one of the brightest young voices in the sunlight and circadian health space. We unpack the growing body of research on sunlight, mitochondria, metabolism, blood sugar regulation, cardiovascular health, and why our modern indoor lifestyles may be contributing to many of the chronic health issues we see today.
Topics Discussed:
→ Is sunlight actually good for your health?
→ Are LED lights harming your metabolism?
→ Can sunlight improve blood sugar levels?
→ Does sun exposure increase skin cancer risk?
→ How does morning sunlight affect your circadian rhythm?
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On This Episode We Cover: 
Further Listening: 
→ EP. 254: How Middle Aged Women Can Use Near Infrared Sauna To Detox And Heal
→ EP. 54: Safe Sunning - Solo Episode
Check Out Jonathan:
→ Instagram
→ Website
→ https://thesignal.riverside.com/
→ https://x.com/Jonathanjarecki
Disclaimer: Information provided in this podcast is for informational purposes only. This information is NOT intended as a substitute for the advice provided by your physician or other healthcare professional, or any information contained on or in any product. Do not use the information provided in this podcast for diagnosing or treating a health problem or disease, or prescribing medication or other treatment. Always speak with your physician or other healthcare professional before taking any medication or nutritional, herbal or other supplement, or using any treatment for a health problem. Information provided in this blog/podcast and the use of any products or services related to this podcast by you does not create a doctor-patient relationship between you and Dr. Tyna Moore. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent ANY disease.