He has worked on the mechanisms regulating nutrient absorption and metabolism for over 25 years. His current work addresses the impact of biofortification, agronomic practices, and food processing methods on the content and localisation of micronutrients in cereals and vegetables, and the bioaccessibility and bioavailability of vitamins and minerals from plant-based foods. He has expertise in the fundamental mechanisms controlling iron metabolism at the cellular level and how these processes are regulated at nutrigenomic and epigenetic levels. His work has been funded by awards from UKRI, UK charities and industry and his team are currently partners on several international GCRF collaborations on mineral bioavailability.