Animal polysaccharides

Polysaccharides almost always have plant origins. There are very few animals (e.g. crustaceans) that have chitin in their shells / exoskeleton, which resemble their vegetable relatives (next to cellulose chitin is the most widely-occurring polysaccharide on earth and contributes to structural formation. See also under 'chitin' in Wikipedia).

Plants consume carbon dioxide and have the ability to combine carbon dioxide with water to produce sugar, which on its part can be converted into polysaccharides. Animals (like humans) must store their energy reserves basically in the form of glycogen (glycogen = animals starch / liver starch; a branched polysaccharide built up from glucose units - see also 'glycogen' in Wikipedia). Glycogen in animals is obtained from various metabolic processes. The extraction of polysaccharides from animals is very expensive and there exists the danger that it contains many proteinaceous impurities and also undesired viruses. It is therefore to be assumed that animal polysaccharides will not be used for the production of graffiti protection products.