Food loss and waste occurs throughout the food system – from farm through to fork. This guide focuses on food waste from households which is a significant issue in many countries.The causes of food waste at household level are complex. There are many drivers and many behaviours, which lead to food being wasted. Many organisations and others who interact with householders have a role to play in helping people reduce the amount of food they waste – by helping to raise awareness and then helping address the barriers to reducing food waste, whether they are related to the product offering or a result of behaviours, skills and knowledge.Champions 12.3 has collated this guide to help key actors in the food system to focus on how they can help consumers reduce food waste through behaviour change.