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7 (95% CI 2.0-3.6), although this was not statistically significant higher than placement only (ratio 1.1, 95% CI 0.7-1.9). Purchases of less healthy snacks did not decline, and even slightly increased, during the intervention period (ratio 1.3, 95% CI 1.1-1.5). If supermarkets want to promote healthier snack purchases, additional healthier products can be positioned near the checkouts. However, this does not discourages the purchase of less healthy snacks. Therefore, to discourage unhealthy snack purchases at supermarket checkouts, a total substitution of