UV-B lighting is essential for vitamin D synthesis in most captive reptiles. Inadequate UV-B is a leading cause of metabolic bone disease and is one of the most preventable reptile welfare failures.
UV-B deficiency is one of the most common and entirely preventable causes of reptile suffering in captivity. A reptile developing metabolic bone disease from inadequate UV-B experiences skeletal pain, pathological fractures, and neurological symptoms that worsen over years before becoming obvious to owners. The tragedy is that appropriate UV-B lighting is widely available and not expensive, but widespread misinformation about reptile lighting requirements — often spread by pet store staff or outdated care guides — leads to chronic welfare failure in many captive reptile collections. The solution requires better education of keepers at the point of purchase and a shift in the reptile keeping community to evidence-based husbandry standards.