David Letourneau is the founder of ENYRGY and the creator of the world's first precision-engineered vitamin D device. His path to building it started with patented LED technology and took a sharp turn when he encountered a clinical trial showing a 60% reduction in ICU mortality among critically ill COVID patients treated with UVB light.

What began as a potential FDA-regulated medical device became a precision wellness tool -- now available for homes and practices around the world. In this episode, recorded live at the Boston BioLive Functional Longevity Summit, David sits down with host Katie Brinkley to walk through the science, the origin story, and exactly how the

device works.

What We Cover:

● The morning sunlight myth: why UVB rays don't reach us until midday, even in sun-heavy states like Arizona

● The clinical evidence linking vitamin D deficiency to 70% of human disease, including cancer, Parkinson's, MS,

and Alzheimer's

● How a 60% ICU mortality reduction in a COVID clinical trial became the spark for ENYRGY

● Why the FDA pathway pushed the team toward wellness and preventive positioning

● Why oral vitamin D supplements don't produce the same immune response as natural UVB exposure

Resources Mentioned:

● ENYRGY device (home and facility versions)

● ENYRGY app (Fitzpatrick skin type quiz, personalized dosing)

● UVB light therapy research

● Boston BioLive Functional Longevity Summit

Discount code: SUN500 ($500 off at enyrgy.com)