His research has focused on food colloids, food ingredient functionality, functional foods and food structure-nutrition interface. He has published 350 papers in international journals, and is one of the highly cited researchers in Agricultural Sciences, with a current H-index of 63. He is co-inventor of 16 patents forming the basis of several commercial innovations. He has mentored 54 PhD students and 37 postdoctoral researchers from around the world, and has received more than $50 million in research funding from both NZ and international food companies and government organisations. He has delivered about 115 keynote addresses at international conferences and sits on the editorial boards of 12 food journals. He has served on several national and international committees, playing a significant role in food strategy development and implementation.