In the United States and such other countries, increasing use of sugar in foods has led to an increase in obesity levels.
Fats and oils include butter, lard, suet, and vegetable oils.
They are all high in calories, but, apart from butter and such vegetable oils as red palm oil, they contain few nutrients.
Foods can be roughly classified into breads and cereals; pulses, or legumes; tubers, or starchy roots; vegetables and fruits; meat, fish, and eggs; milk and milk products; fats and oils; and sugars.
Breads and cereals include wheat, rice, corn, and millet.