Professor Tim Spector is a Professor of Genetic Epidemiology and Director of the TwinsUK Registry at Kings College in London. His current work focuses on the microbiome and has collaborated with experts around the world to conduct the largest nutritional study of its kind, the PREDICT study, in associated with healthcare science company ZOE. Here he shares the latest insights into emerging dietary components such as personalised nutrition and polyphenols, and their impact on the gut microbiota and health.