Lower Vitamin D Linked to Depression and Cognitive Decline in Elderly Diabetics

In a winter clinic in Lodz, Poland, researchers drew blood from 188 people in their late eighties, all living with type 2 diabetes, and found that those carrying the twin burdens of depression and cognitive decline also carried the lowest levels of vitamin D. The pattern held even after accounting for age, education, and illness — a correlation quiet but consistent, pointing toward a possible thread between the body's chemistry and the aging mind. Science has not yet determined whether this deficiency is a cause, a consequence, or simply a companion of suffering. But in one of humanity's most