Vitamin D3 5000 IU daily. This strengthens your immune system and helps prevent infections. Google "vitamin D3 and surgery" to see studies on this.
I've actually already been taking that for about a year, will continue to do so. Thanks.I'm also taking creatine(I've heard that it's better to quit around surgery time), zinc, omega 3. Will get on calcium & magnesium soon as well my surgery is in less than 4 weeks.