Professor Richard Mellanby from the VitDAL gave a presentation on the health benefits of vitamin D at the Biggar Science Festival this week. The Biggar Science Festival is a fantastic 10 day celebration of science past, present and future and offers a great range of science engagement activities for all ages – further details can be found at their website. Richard discussed the history of vitamin D and reviewed some recent studies which have shown how vitamin D can influence the immune system. The relaxed venue was a perfect place to then engage in a wide ranging discussion about our current understanding of the importance of vitamin D in health and disease.