07 Nov 2019 --- Vitamin D contributed to slowing the growth of melanoma cells and stopped their spread to the lungs of mice. These were the findings of a University of Leeds study, which found that the vitamin influences the behavior of a signaling pathway within the cells. The researchers have highlighted that insights from this study could be used to boost the effects of immunotherapy and lead to new ways to treat the skin cancer. However, experts are flagging that the results should not be interpreted as an excuse for people to stay in the sun for excessive periods of time.