I have a friend who went to Mexico to gain a bigger butt and said, collagen was injected in her rear. If this is possible, what are some consequences of collagen injection? Can there be problems? It's been more than 2 years since she got these injections, and seems to be doing fine! I was considering doing the same, but I'd rather do a bit more research on it.
Updated 11/25/09: Where can my friend go to check herself? What's her best way of solving this?