In this episode of The Science of Sunshine, Dr. Anne Berends speaks with Prof. Timo Partonen, a leading circadian rhythm and Seasonal Affective Disorder (SAD) researcher at the University of Helsinki. Together, they explore how winter darkness disrupts our internal clock, why so many people experience winter blues or SAD, and how modern indoor lifestyles may be amplifying these effects.

Prof. Partonen explains the biological pathways linking light exposure to mood, sleep, metabolism, and energy — and why morning light plays a critical role. The conversation also covers proven treatments like bright-light therapy, as well as emerging research into UVA1 and near-infrared (NIR) light.

Overview: What if the light around us could shape our health, mood and energy? In this first episode, Dr. Anne Berends talks with Dr. Jennifer Veitch, President of the International Commission on Illumination (CIE), about the science of sunshine — and how different parts of natural light influence our well-being.

Together, they explore how ultraviolet, visible, and near-infrared light each plays a unique role in human health — from vitamin D production and circadian rhythm to cellular repair and mood regulation. You’ll discover what happens when we spend 90% of our time indoors, how modern lighting has changed the way we experience daylight, and why the future of wellness may depend on bringing the full spectrum of sunlight back into our lives.

Get ready for The Science of Sunshine: The Future of Light and Wellness