Starved for Light

A wide-ranging history of rickets tracks the disease’s emergence, evolution, and eventual treatment—and exposes the backstory behind contemporary worries about vitamin D deficiency.   Rickets, a childhood disorder that causes soft and misshapen bones, transformed from an ancient but infrequent threat to a common scourge during the Industrial Revolution. Factories, mills, and urban growth transformed the landscape. Malnutrition and insufficient exposure to sunlight led to severe cases of ric