The Chemistry Behind Nutrition Labels

1008 Words3 Pages

Nutrition labels are the labelings that one sees on food packaging. Nutrition labels have important values and information. All of the values and information involved in a nutrition label involve chemistry. The chemistry within these nutrition labels are essential to everyone and affect people’s daily lives so they know what they are consuming in their bodies. There are many big ideas revolving around nutrition labels. Fats, proteins, carbohydrates and the Kjeldahl Method are just four big ideas that have a major involvement in nutrition labels and there is lots of chemistry behind these big ideas.

Fats
The chemistry involved with fats is in the creation of fats and the breakdown of fats and food preparation. Fats are a subgroup of compound …show more content…

Protein is one of the many things that can be seen on a nutrition label. “A protein is a linear sequence of amino acids linked together by peptide bonds…” (Food Proteins p.1). Amino acids make up a protein because they are connected by the peptide bonds. There are charged and uncharged amino acids as well as hydrophobic and hydrophilic amino acids. A charged amino acid is an amino acid “that can carry a charge depending on the pH” and an uncharged amino acid just doesn’t have a charge (Food Proteins p.1). A proteins structure can also be changed or denaturalized. “The native structure of a protein is energetic minimum under physiological protein. Any change in conformation away from this shape will represent an energy cost” (Food Proteins p.5). Proteins that are apart of our food and nutrition labels have the ability to be changed but energy needs to be used in order for the denaturalization of the protein to occur. There is a process known as the Udy Dye Binding Method that is used to analyze proteins. “In this procedure, ground grain is shaken with an orange dye solution. This acid dye forms an insoluble dye-protein complex with the basic amino acid building blocks of protein” (McDonald p.3). The dye used in this method is acidic and makes a protein that cannot be dissolved and has the building blocks of proteins still within it called amino …show more content…

Nitrogen in food can be found within protein. “In the basic method for protein, nitrogen is determined by a method of chemical analysis known as the Kjeldahl procedure. The nitrogen found, times a factor of 5.7 for wheat and 6.25 for other grains, gives the content of crude protein” (McDonald p.3). In doing the Kjeldahl Method, one has to multiply the amount of nitrogen, the amount of wheat and the amount of other grains in order to determine the crude protein. “The Kjeldahl Method is used to determine the nitrogen content in organic and inorganic samples. It is based on the digestion of the sample in boiling concentrated sulphuric acid, with the addition of a catalyst. The sample is digested until dissolution and oxidation. The nitrogen contained in the sample becomes Ammonium Sulphate” (Panreac p.2). When performing the Kjeldahl method, a catalyst is used to speed up the chemical reaction(s) in order to help with finding the nitrogen

Open Document