Photobiology, Sunlight, Firelight, Incandescent Bulbs vs. LEDs, Mitochondria, Melatonin, Sunscreen & the Optics of the Body | Scott Zimmerman | 146
Mar 19, 2024
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The podcast delves into how light impacts our cells, discussing melatonin as an antioxidant, the effects of red & near-infrared light on mitochondria, sunlight vs. artificial light, incandescent bulbs vs. LEDs, negative health effects of artificial light, sunscreen & makeup, red light therapy, and the optical properties of the human body.
Different types of light sources affect the body differently, with near-infrared light influencing mitochondria and melatonin production.
Red and near-infrared light impact physiological functions like glucose levels and neurological processes by stimulating mitochondrial activity.
Sunscreens may enhance exposure to visible light, causing oxidative stress and potentially affecting hormonal levels and skin health.
Deep dives
Optics and Photobiology of the Human Body
The podcast delves into the optics of the human body and how it responds to light, including different types of light sources like sunlight, firelight, LED, and incandescent light bulbs. Discussions reveal that light, especially near-infrared light, affects various aspects of physiology such as influencing mitochondria and melatonin production. The impact of artificial light compared to sunlight, the effects of red and near-infrared light therapy, and how skin color influences light absorption are explored.
Effects of Near-Infrared Light on Mitochondria and Cells
There is a focus on the effects of near-infrared light on mitochondria, cellular functions, and how the human body responds to different wavelengths of light. Discussions highlight how red and near-infrared light impact physiological functions like glucose levels, hypertension, and neurological processes. The mitochondria's role in ATP production, antioxidant capabilities, and the stimulation of mitochondrial activity in response to red light exposure are emphasized.
Discrepancies in Sunscreen Use and Impact on Health
The conversation addresses the use of sunscreen and its effects on health, emphasizing its impact on oxidative stress and the body's response to different wavelengths of light. The podcast explores how sunscreens often focus on blocking UV light but may enhance exposure to visible light, increasing oxidative stress. It discusses the optical aspects of sunscreen application and how different skin types and genders react to sunscreen, highlighting potential detrimental effects on hormonal levels and skin health.
Impact of Sunlight Exposure on Health
Exposure to sunlight without sunscreen can have various impacts on health. The discussion highlights the importance of regulating sunlight exposure without overdoing it. It emphasizes the significance of balancing time spent in the sun without sunscreen, indicating that monitoring skin response and adjusting behavior accordingly is crucial for health benefits. The conversation underscores the natural signaling mechanisms in the body, suggesting that sunburn, though undesirable, plays a role in learning to manage sunlight exposure effectively.
Significance of Near-Infrared Light in Daily Life
The podcast delves into the significance of near-infrared light in daily life and its impact on our biology. It emphasizes that modern environments often lack sufficient levels of red and near-infrared light, essential for biological functions. The discussion highlights the importance of incorporating incandescent light sources to provide a balance of near-infrared light mimicking natural sunlight. By focusing on the biological effects of light exposure, the conversation prompts reconsideration of light choices for overall well-being.
About the guest: Scott Zimmerman is an optical engineer and photobiology expert
Episode summary: Nick and Scott talk about: how light interacts with the body and affects our cells; melatonin as an antioxidant; how red & near-infrared light affect mitochondria; sunlight, fire light, and artificial light; incandescent light bulbs vs. LEDs; negative health effects of artificial light; sunscreen & makeup; red & near-infrared light therapy; the optical properties of the human body; and more.
*This content is never meant to serve as medical advice.
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