Carbohydrates (also called saccharides) are molecular compounds made from just three elements: carbon, hydrogen and oxygen.
Proteins are made up of chains of small organic molecules called amino acids such as glycine, alanine, lysine or tryptophan. Amino acids contain an amine functional group, which contains a nitrogen atom, possibly one or two atoms of hydrogen, and a carboxylic acid group, which has the formula -COOH.
Fats. Fats are large molecules that are composed of three fatty acid molecules bonded to a glycerol molecule. The fatty acid molecule is a long chain of covalently bonded carbon atoms with nonpolar bonds to hydrogen atoms all along the carbon chain with a carboxyl group attached to one end.
there you have it. all foods contain the above in differing quantities.
No such thing as clean and dirty food, its just food.