Oksana recently introduced me to PRP treatments for premature skin laxity due (in part) to hypermobility syndrome. What I liked was that this would be my own blood cells making the change; I couldn't be happier with the results, even after the first session I saw a difference.
I'd recommend Oksana highly if you're looking to maintain plump / firm skin (in areas that might also be mildly affected by a connective tissue disorder) with someone who has a superb sense of a healthy aesthetic.