Dr Weller is one of the world leading authorities when it comes to the health benefits of Sunlight. Over the past 25 years, he has studied and worked in England, Australia, Germany, the USA and Scotland. His research training was in the laboratories of Professor Victoria Kolb-Bachofen in Düsseldorf, Germany and Dr. Tim Billiar in Pittsburgh, USA. He wrote the textbook Clinical Dermatology in 2013 with the hopes of enthusing family doctors with the joy and challenge of diagnosing and treating skin disorders and has published well over 100 scientific papers.  His research on skin and nitric oxide has made him passionate about helping people understand that  sunlight has benefits as well as risks.