Her current research is focussed on the health effects of vitamin D and she interested in public health interventions to reduce the risk of vitamin D deficiency. She using The Health Improvement Network (THIN) database to examining time trends in the number of adults who are tested for vitamin D deficiency in primary care. She is also investigating the effects of vitamin D supplementation on bone health in Afghan children and is involved in evaluating the long-terms effects of a weaning-food hygiene intervention that was implemented in the Gambia.