Changing my coworker

I have a coworker who is thin, 25 years old and has a high motabilism. All day she usually eats junk food & fast food and drinks mt. dew & ice coffee. Well, that has all changed. She sees the changes I have made and now I see her looking at labels, eating better, drinking water and less soda and now she says she goes for walks with her sister-in-law. I think our talk about physically changing after 30 might have gotten her on the right track. So, I have to say that I am taking credit for my coworkers changes.