Professor Richard Mellanby from VitDAL was invited to deliver two oral presentations at the 21st Workshop on Vitamin D which was held in Barcelona this week. He presented some recent work from the VitDAL including our studies on how vitamin D modulates the function and phenotype of dendritic cells together with some of our recent analysis on the relationship between vitamin D status and ecological fitness in wild Soay sheep. As usual, the annual international conference brought together the leading researchers in the field of vitamin D biology and provided an excellent opportunity to hear about recent advances in the area.