Coomassie Blue Staining is a histochemical staining technique used to identify proteins and polysaccharides in gel electrophoresis. It is a simple, quick, and inexpensive technique that results in the visualisation of proteins on a gel. Coomassie Blue staining is a popular choice because it reveals the structure of proteins even in the presence of other molecules. The Coomassie Blue dye binds to proteins, allowing their selective visualisation. The intensity of staining can be used to compare the amount of protein present in different samples, providing useful information in many areas, such as biochemistry, genetics, and cellular and molecular biology. The staining procedure is simple and can be completed in a single day.