Cellulose fibers are long, linear polymers of hundreds of glucose molecules.
Chitin is a fibrous substance consisting of polysaccharides, which is the major constituent in the exoskeleton of arthropods and the cell walls of fungi.
Keratin is the type of protein that makes up your hair, skin, and nails.
Keratin can also be found in your internal organs and glands.
Keratin is a protective protein, less prone to scratching or tearing than other types of cells your body produces.
Proteins are essential nutrients for the human body.
They are one of the building blocks of body tissue and can also serve as a fuel source.