Table 1.

Food categories included in the food diary

Food category	Description
Fruits	Fruit peel, stone fruit, dried fruit shell, fruit leftovers, bad fruit (rotten fruit).
Vegetables and legumes	Vegetables peel and leftovers, external or inedible parts, rotten vegetables.
Pasta and rice	Pasta and tortillas leftovers, including also whole-wheat pasta and other typologies.
Meat and meat products	Meat leftovers, nerves, fats and bones, rotten meat, skins, meat with color, smell or taste altered.
Fish and fish products	Fish leftovers, bones and scales, fish with color, smell or taste altered.
Milk and dairy products	Leftovers or waste related to milk, yogurt, ice-creams, eggs, cheese and other products composed by milk as main ingredient.
Bread and bakery products	Leavened and unleavened, both sweet (cakes, pastries and biscuits) or salty, regardless of the preparation method.
Prepared meals	Prepared and semi-prepared meals (e.g. ready-to-eat chips, jam), including frozen products (e.g., salad, minestrone soup).

(Source: Personal elaboration by the authors)