Asda's Healthy Eating Nudge Trials: A Comprehensive Analysis
Asda, in collaboration with the research foundation Nesta, has embarked on a two-year journey to explore the impact of subtle interventions on shoppers' dietary choices. The trials, which concluded last week, have yielded fascinating insights into the effectiveness of 'nudge' strategies in promoting healthier eating habits.
The primary objective was to increase the sales of healthy food options while simultaneously boosting overall category sales. Asda aimed to achieve this by implementing small changes that would collectively contribute to a significant reduction in daily calorie intake for customers.
The Trials and Their Focus
The trials, conducted in up to 20 stores across the southeast of England, centered around four key 'levers' believed to influence healthier buying habits: product positioning, merchandising, messaging, and incentives.
These tests were designed to provide Asda with the necessary evidence to make informed decisions and implement successful changes on a larger scale. Importantly, the trials did not involve product reformulation or pricing adjustments, focusing instead on subtle interventions.
What Worked: The Power of Positioning
Among the four levers, product positioning emerged as the most effective strategy. Three specific positioning techniques were tested:
- Wire bins strategically placed around the store, showcasing healthy snack options.
- Fruit and nut pots positioned at checkouts, enticing impulse purchases.
- Healthier product swaps at store checkouts, encouraging customers to choose healthier alternatives.
The results were impressive. Wire bins demonstrated a 14% increase in healthier snack volume, while fruit and nut pots at checkouts led to a 16% increase in healthy volume sales. These findings highlight the importance of placing healthy products in locations where impulse purchases are likely to occur.
What Fell Short: Messaging and Incentives
In contrast, other strategies fell short of expectations. The trial involving healthier pizzas, given more visibility and space in chillers, had no measurable impact on sales or health outcomes. This outcome underscores the challenge of influencing customer behavior through subtle changes in a single area of the store.
Messaging also played a crucial role, but the results varied. 'Less than 100 calories' messaging increased sales by approximately 6%, while 'source of fiber' messaging had the opposite effect, decreasing sales by 8%. This highlights the importance of understanding customer preferences and the resonance of different messages.
Incentive trials, such as offering vouchers to pharmacy customers for fresh produce, had limited success. Only a small percentage of vouchers were redeemed, suggesting that customers used them for purchases they would have made anyway. Similarly, a promotion encouraging the purchase of fruit pots with a free lunchbox had a temporary effect, disappearing once the promotion ended.
The Way Forward: Commercial Sustainability and Policy Implications
Asda's trials have demonstrated that increasing opportunities for healthier eating can be commercially sustainable. However, the company emphasizes that achieving meaningful and sustained change requires significant long-term investment and measurement.
The findings have important implications for policymakers. As the UK government moves towards mandatory healthy sales reporting and targets, Asda's partnership with Nesta provides timely evidence that outcome-based targets can drive healthier sales. The report recommends that changes to business practices must be commercially sustainable and aligned with operational realities.
One of the key recommendations is to ensure that the proposed 2018 NPM update is accompanied by clear timelines and implementation guidance. Consistency across devolved nations is also crucial, although this prospect seems less likely given recent developments. Health groups have welcomed the findings but argue that nudges alone are insufficient to shift diets at scale, emphasizing the need for structural measures like lower pricing of healthier options and reformulation.
In conclusion, Asda's healthy eating nudge trials offer valuable insights into the effectiveness of subtle interventions in promoting healthier eating habits. The results provide a nudge for policymakers to consider the practicalities of supermarkets and the need for sustainable solutions. As the industry continues to evolve, these findings contribute to a growing body of knowledge on how to drive healthier sales in a commercially viable manner.
