What are collagen and collagen peptides?

Collagen is one of the most abundant proteins in nature, it is a kind of biological macromolecular substance with molecular weight above 300,000, insoluble in water, and it is an important material basis for the survival and growth of animals.
Collagen peptide is a kind of small molecule chain composed of many kinds of amino acids produced by degradation of large molecule collagen protein under the action of high temperature, acid, alkali and enzyme. They are completely soluble in water and are high quality nutrients that can be directly absorbed by plants and animals. Collagen peptide can be completely dissolved in water (cold water can also be dissolved), aqueous solution of low viscosity in 60% of the high activity also has mobility, good acid and alkali resistance, in the presence of acid, alkali are no precipitation; high temperature resistance is good, 200 ℃ heating also no precipitation.