How could supermarkets cut the amount of unhealthy eating behaviors?

Reduce eye catching advertising (POS) on highly unhealthy products, bring in a policy of sourcing manufacturers who reduce salts, sugars and e factors in food, reduce slot allocation on the shelf for unhealthy products and increase the healthier version, increase POS to tell customers where healthy options are situated, Educate staff to understand the issue of the product in the unhealthy sector, seek to reduce selling price of healthier option and and cross price (increase the price) of the unhealthy option. reduce till side candy ( sweets and chocolate bars)