Filling the gaps: the need for more research on portion size of pre-packaged foods and intake behaviour.

The portion size of pre-packaged food and drink products is one of the suggested areas of focus within the calorie reduction pledge of the UK government's Public Health Responsibility Deal. Food businesses are encouraged to commit to this pledge to help consumers decrease their overall energy intake. There is a lack of evidence, however, to suggest that changes in the portion size of pre-packaged food and drinks will lead to a decrease in overall energy intake. The Institute of Grocery Distribution's ( IGD) Industry Nutrition Strategy Group convened a working group to review the evidence available on the portion size of pre-packaged food and drink and its relation to consumption behaviour. This involved input from a stakeholder workshop that identified gaps in the evidence base. The working group also documented informal aspects that can influence portion size from the perspective of the food industry. In their Report, the working group concluded that there is a need for more evidence in relation to the portion size of pre-packaged food and drink and its impact on consumption behaviour. Further research will help determine how portion sizes may be optimised to support consumers in managing their energy intake, while satisfying appetite and avoiding any unintended consequences. The Report makes recommendations for priority areas. These include determining whether portion size of pre-packaged products is the best instrument to help consumers manage their energy intake and understanding the impact of promotional dynamics on consumption behaviour. It is anticipated that investigation of these areas will inform the debate on the portion size of pre-packaged foods and drinks and provide evidence to help guide decisions about portion size in practice. [ABSTRACT FROM AUTHOR]