There are a total of 33 food product groups which can use the Keyhole. Within each product group, different criteria are considered (fibre, fat, sugar and salt).
For example, a Keyhole-labelled breakfast cereal will contain more fibre and less sugar than a breakfast cereal without the symbol. In meat products, the proportion of saturated fats and salt is considered most important, while a Keyhole-labelled bread on the other hand must meet the criteria for fibre, fat, sugar and salt.
In certain food groups there are also requirements for the content of vegetables, fruit, berries and whole grain. In certain product groups, such as soda, candy and chocolate, cakes and biscuits, no products can be labelled with the Keyhole symbol.