Most practitioners look at symptoms, labs, nutrition, and biochemistry when someone is struggling with chronic health challenges. Those are important, but they’re only part of the picture.
The body is also responding to environmental signals every day, including light, darkness, and temperature. These inputs influence circadian rhythms, mitochondrial function, hormones, sleep, recovery, and resilience.
In this episode of ReInvent Healthcare, Dr. Ritamarie is joined by Nathan Siles, co-founder of BioSpectral Systems, to explore biophysics and the relationship between our environment and human biology.
Nathan explains why supporting health isn’t only about what we put into the body. It’s also about creating an environment that supports the way our biology is designed to function.
What’s Inside This Episode?
- Why light is biological information, not just something we see
- How circadian rhythms affect sleep, hormones, and metabolism
- Why environmental signals matter for mitochondria, energy, and resilience
- How modern indoor environments can disrupt biological signals
- Why morning light and nighttime darkness matter
- The connection between light, the eyes, brain, and hormones
- How temperature, movement, water, and other environmental inputs shape biology
- Why practitioners may need to look beyond biochemistry
- Practical ways to create an environment that supports healthy biology
If you support people dealing with fatigue, poor sleep, metabolic dysfunction, chronic stress, inflammation, or declining resilience, this conversation will give you a deeper understanding of the environmental signals that shape health every day.
Resources and Links:
Guest Resources and Links
Nathan Siles
Nathan Siles is the Co Founder of BioSpectral Systems, a company dedicated to restoring human health by improving the light environments people live and work in every day. Through education and practical products, BioSpectral helps people better support sleep, energy, eye and brain health, recovery, and long term performance by bringing indoor living back into closer alignment with how human biology is designed to function.
A two time cancer survivor, including childhood brain cancer, Nathan brings deep lived experience to his work, alongside more than a decade spent helping clients improve their health through a foundational approach. He is also the Co Creator of the BioTra Approach and the founder of It’s Now You Health Consulting. His work centers on the core foundations of health, including light, water, magnetism, mitochondria, thermoregulation, and circadian biology, showing how these often invisible forces shape biology, performance, resilience, and longevity in the modern world. Having worked internationally with CEOs, executives, entrepreneurs, professional athletes across multiple leagues, and chronically ill individuals, Nathan’s mission is to help people understand how visible and invisible light, circadian biology, and the modern environment influence vitality, clarity, and the ability to perform at a high level in business and life.