The 7 groups of foods are grouped according to nutritive content. The 7 were first listed in 1942, then reduced to 4 in 1955. Later the USDA included 6 of them in its "food pyramid", which was modified in 2005 to stress 5 in greater value and 1 (fats) of lesser value.
The Seven Groups (1942)
- Milk
- Vegetables
- Fruits
- Eggs
- Meat (Fish, Poultry, Cheese)
- Cereal
- Butter
(see related image links)
The "5 plus 1" pyramid (2005)
- Grains
- Vegetables
- Fruits
- (narrow band) Fats and Oils
- Milk and Dairy
- Meat and Beans