Absolutely not.
Collagen is a protein and only needs to be digested to be absorbed. Vitamin C is needed by our body to synthesize new collagen.

Is it necessary to supplement it? No one currently has a definite answer to this question. When in doubt, since it has no harmful effects and if it is not needed it is simply excreted with the urine, I take it.

How much vitamin C to take? It depends on when it is taken and whether it is taken together with carbohydrates, since the transporter within the cell for vitamin C is the same as that used by glucose, and glucose has precedence for use.