Depending on where they are sourced from they can play either an effective part, or a highly effective part.
The science behind fibril size and structure goes pretty deep. This is key in that if their size and structure isn't right they won't fit in the body as well. It's a bit like having a piece of the jigsaw puzzle that's not quite right.
Sure, you can try to make it fit but if it doesn't… Well, you get the point.
The tricky thing is understanding how these move through the body. Collagen is needed for many functions. Without it, the effects of aging are much sooner pronounced. From connective tissue structure to younger looking skin, it has a part to play.
If you look to supplement for your collagen peptides then choose the type that align with your values.
There are plant based options instead of animal based options should you choose them. Seems like a bit of a tall story, but the science is in. You can find out more about that here: The Truth Behind Collagen in Plants