Precision nutrition enables investigation of many factors that influence our health—whether the composition of foods we eat, how and when we eat, and what influence our genetics and the composition of our microbiomes has on health. I speak with Dr. Sarah Berry, a nutrition scientist at Kings College London who was led more than 30 randomized clinical trials on human nutrition and cardio-metabolic health. She shares some key insights from the large PREDICT studies, which assess the genetic, metabolic, metagenomic, and meal-dependent effects on metabolic responses to food. Follow her on Twitter at @saraheeberry