The Health Star Rating System in Australia and New Zealand: A Policy Case Study and Its Implications for Front-of-Pack Nutrition Labelling

Abstract

This paper examines the Health Star Rating (HSR) system in Australia and New Zealand as a front-of-pack (FOP) nutrition labelling policy, with a focus on its role in improving obesity-related dietary health and its potential applicability in other contexts such as China. While the HSR aims to simplify nutritional information and support healthier food choices, this study suggests that its effectiveness is constrained by both behavioral and structural limitations. The analysis shows that the HSR enhances consumer understanding by providing a simplified summary of nutritional quality and facilitates product comparison within categories. It also creates incentives for manufacturers to reformulate products. However, these benefits do not necessarily translate into meaningful improvements in dietary behavior or weight management outcomes. Consumer misunderstandings, including inappropriate cross-category comparisons and the health halo effect, may distort perceptions of product healthfulness. In addition, the system does not account for portion size or total energy intake, limiting its relevance to obesity prevention. At the structural level, the voluntary nature of the HSR leads to selective labelling, with higher-rated products more likely to display the rating, resulting in a biased information environment. Incomplete market adoption further reduces its population-level impact. The paper suggests that while HSR-type systems may offer useful insights for countries such as China, their effectiveness would depend on adaptation to local regulatory frameworks. Emerging digital and AI-based tools may provide a potential pathway to enhance the system by enabling more personalized and context-specific dietary guidance.