Is facial collagen like enamel in that once it has gone, it has disappeared and nothing can return it?

Think it’s possible to get it back

The whole process how bodies manage collagen is sort of strange. Allegedly, selling collagen supplements that are taken orally are one of the biggest scams.

I would think that if there was a way to stimulate your body to make more of it again, you'd have it. Enamel is different.