Collagen is a protein. When you eat collagen, it enters the stomach, and the stomach uses the acidic environment and enzymes to break down the proteins. In this way, the collagen begins to be broken down to produce basic amino acids. The digestion reactions continue in the duodenum, and begin to absorb the amino acids through specific amino acid channels.
What we can see is that collagen is transformed into amino acids like any other protein, that is, eating any other source of protein generates the same factors as collagen. Therefore, the correct way to eat is not with collagen, but with a healthy diet, and with all the necessary nutrients.
In order for the skin to remain youthful, it needs, in addition to the formation of collagen, the inclusion of glycosaminoglycans, combined with hyaluronic acid. This entire system is organized in such a way as to form a matrix that needs to unite glycosaminoglycan molecules, collagen molecules and hyaluronic acid molecules, to act on your skin. There cannot be only collagen, nor only regions with glycosaminoglycans, nor regions with hyaluronic acid, but rather, all of them united with the correct polarizing effect that is performed by the body itself. Therefore, the use of none of these separate products will help, but rather a polarized and correct matrix must be built.