In response to this question from a friend I advisdd that it won't slow the aging process down. You'll still age in the same time as any other person, but it will help maintain a much higher level of health and a youthful appearance for longer than if you didn't take it.
This article looks at some of the benefits of collagen but more from a non-animal based source perspective.
There was another post I found at that went deeper into the topic of a Vegan source of collagen and it broke down the 20 different types of collagen found in the human body and the sources for these
Not to sound like I'm beating the Vegan drum on this, they are just a couple of informative posts on the topic and how collagen plays a key part in looking younger and being healthier.
It's also important to note that you'll have much better results with collagen that you consume if you detox regularly. Doing a 30 day bentonite detox will help in preparing your body to benefit from the collagen more effectively.
I'd suggest you talk with your Doctor before implementing anything like this though, just to be on the safe side.