The University of Queensland May 14 2025 Newborn babies with a vitamin D deficiency have a higher chance of later developing mental disorders such as ADHD, schizophrenia and autism, a major study involving The University of Queensland has found. In the largest population study of its kind, researchers examined vitamin D status of 71,793 people, many of whom had a mental health disorder diagnosed during childhood and early adulthood. Professor John McGrath from UQ's Queensland Brain Institute,