Is it safe to take vitamins and supplements before and after a BBL?

Is it safe to do the HCG diet right before surgery? I'm 4 weeks Pre Surgery and I'm taking a multi vitamin, vitamin D-3, iron, and CLA are these ok to take? I've also wanted to try Visalus protein shakes but they have 30% Vitamin E in each shake and I was told to stay away from E, is that correct? Should I take any meds before surgery that will help healing or bruising process? Is there a certain amount of sodium I shud consum before and after surgery for less swelling? Thanks!