Healthy Sunbathing (IMAGE) University of Veterinary Medicine -- Vienna Caption The sun in the mountains allows the body to produce vitamin D in winter. Credit Photo: Heike Hochhauser/Vetmeduni Vienna Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.