This week on The Research Collective, join us as we wrap up our Sleep Series with a look at a surprising player in sleep regulation: vitamin D. Often known for its role in bone health, vitamin D also influences sleep quality, duration, and even daytime fatigue. In this episode, we explore how deficiency in this “sunshine vitamin” might be linked to insomnia, sleep apnea, and more — especially in communities with limited sun exposure or chronic health disparities. Let’s shed light on the connection between sleep and sunlight.