Will loosing 15 lbs after my tummy tuck affect my results? Will my skin now be loose?

Although we would ideally like you to be as close to your goal weight as possible prior to your tummy tuck, losing an additional 15lbs after shouldn't significantly affect your results.  What's most important is maintaining your weight and living a healthy lifestyle so you can continue to enjoy the benefits of your new body. Best of luck!

An abdominoplasty deals with excess skin excess fat and abdominal wall laxity. Weight loss after correction of these issues will not significantly affect the results.

I wouldn't be too concerned about loosing weight after your tummy tuck;  especially that amount.  Your skin will likely fit your new figure quite well since a tummy tuck gives you a tight tailoring.  I think it's always a good idea to achieve your ideal weight if that is your goal.